Brain Quest — Science Riddles & Puzzles

Science Mystery

The Invisible Shield

I am invisible, yet I protect all life on Earth. Without me, the Sun would burn everything alive. Scientists discovered a hole in me in 1985. What am I?

5 XP 42 tried · 39 solved

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Science Mystery

The prison

I trap light so it can never escape, I am born when a giant star dies. What am I?

5 XP 4 tried · 1 solved

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Science Mystery

The winter flower

I bloom in the sky in winter, I fall like flowers but I am made of frozen water. No two of me are same. What am I?

5 XP 2 tried · 2 solved

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Science Mystery

The Universe's Speed Limit

I race faster than anything known. I have no weight, but I carry energy across the universe. What am I?

5 XP 14 tried · 11 solved

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Science Mystery

The Hidden Bond

I am invisible, yet I hold atoms together. Break me, and energy may be released or absorbed. Without me, no molecules could exist. What am I?

5 XP 18 tried · 16 solved

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Science Mystery

The Endless Push

I have no engine, no wings, and no fuel. Yet once I begin moving through empty space, I can keep moving for millions of kilometers. What law explains this?

5 XP 16 tried · 7 solved

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Science Mystery

The Silent Guardian.

I protect every living cell, Yet I am thinner than a strand of hair. I decide what enters and what leaves, Without me, life cannot survive.

5 XP 16 tried · 16 solved

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Science Mystery

The Tireless Pump

I never sleep, I never take a holiday, I work from before you're born Until your final breath. Who am I?

5 XP 16 tried · 16 solved

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Science Mystery

The Silent Current

I travel through wires, Yet you can never see me. I light your room, Charge your phone, And power entire cities. What am I?

5 XP 17 tried · 15 solved

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Science Mystery

The Tiny Universe

I am made of tiny particles. But I am not alive. I have a center with things going around it, Like a miniature solar system.

5 XP 19 tried · 11 solved

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Science Mystery

The Invisible Builder

I am too small to see with your eyes. Some of us make yogurt, Some help your stomach, Some can make you sick. Without us, life on Earth would struggle. Who are we?

5 XP 16 tried · 16 solved

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Science Mystery

The Green Factory

I am a quiet factory that runs completely without electricity. I take in sunlight, water, and invisible gas, and I turn them into food for myself and fresh air for you. What process am I?

5 XP 16 tried · 16 solved

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Science Mystery

The Universal Mixer

I have no colour, No smell, No taste. Scientists call me the universal one, Because I dissolve more substances than anything else. What am I?

5 XP 15 tried · 15 solved

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Science Mystery

The sun chef

I eat sunlight, I drink water, I never go to the kitchen but I make food for the whole world. Who am I?

5 XP 18 tried · 14 solved

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Science Mystery

The invisible power

I have no weight, you can't see me, but without me you can't live for even 5 minutes. I am taken in by your lungs. What am I?

5 XP 17 tried · 16 solved

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Science Mystery

The red river

I am red, I flow but not a river, I have no fish but I carry life to every part of your body. What am I?

5 XP 18 tried · 18 solved

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Science Mystery

The long journey inside you

I start with a bite but I have no mouth, I travel 30 feet without legs, I have acid but I am not angry, and I give you energy without eating myself. What am I?

5 XP 15 tried · 12 solved

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Science Mystery

The Invisible Sculptor

I have no hands, yet I carve valleys. I have no eyes, yet I reshape mountains. Sometimes I whisper for centuries, Sometimes I roar in a single day.

5 XP 17 tried · 13 solved

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Science Mystery

Chemical helper

I hide in stone with a frosty name, Though I'm no ice, I earned my fame. I helped make shining metal flow, In fiery baths where furnaces glow. A fluoride rare, once prized by all.

5 XP 16 tried · 14 solved

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Science Mystery

The World's Greatest Recyclers

We are everywhere, Yet most people never notice us. Without us, Dead plants and animals would pile up forever. Who are we?

5 XP 15 tried · 15 solved

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Science Mystery

The Invisible Giant

I have no colour. I have no shape. You cannot see me, Yet I keep your feet on Earth, The Moon around Earth, And planets around the Sun.

5 XP 17 tried · 17 solved

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Science Mystery

The Silent Rust Maker

You breathe me every second. Without me, you would die. Yet when I slowly meet iron, I quietly destroy it. Who am I?

5 XP 17 tried · 17 solved

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Science Mystery

The Endless Fall

I am always falling towards Earth, but I never hit the ground. I pull on the oceans, but I have no hands. I have no fire of my own, but I shine brightly in the dark. What am I?

5 XP 16 tried · 14 solved

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Science Mystery

The Water Thief

I am a very strong . I can take water out of sugar. Factories use me a lot to make fertilizer. Who am I?

5 XP 19 tried · 16 solved

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Science Mystery

the disaster

I have no voice, but I make the world shake. I’m made by the shifting of plates. I'm measured by a Richter scale, but I'm not a weight. I can topple towers and alter the earth's fate.What am I?

5 XP 21 tried · 21 solved

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Science Mystery

The Ultimate Brain Teaser

I slow near giants, I race in the void, I cannot be touched, Yet I change everything. Without me, the universe has no story. What am I?

5 XP 19 tried · 19 solved

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Science Mystery

Nature's Hidden Code

I am not a book, yet I hold life's instructions. I am not alive, yet I am copied billions of times. I am found in almost every cell, And though invisible, I shape every living thing. What am I?

5 XP 29 tried · 29 solved

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Science Mystery

Think Like Einstein.

The faster you move, the slower I become for you. You cannot see me, but Einstein proved I can bend. What am I?

5 XP 24 tried · 20 solved

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Science Mystery

The First Responder

I race through your body faster than your feet ever could. You have never seen me, but you've felt me every time you touched a hot stove. I carry no words, yet I deliver every message. What am I?

5 XP 26 tried · 22 solved

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Science Mystery

The Thief of Iron

steal away your iron without making a sound. The wetter the weather, the faster I work. I never eat, yet I slowly consume metal. What am I?

5 XP 29 tried · 28 solved

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Science Mystery

Attraction.

You cannot see me or touch me, but I decide whether you stand, fall, or orbit. Without me, galaxies would never exist. What am I?

5 XP 30 tried · 30 solved

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Science Mystery

The Invisible Messenger

I have no feet, yet I travel through the air. I have no mouth, yet I carry every word you hear. I can bounce off walls and return to you. What am I?

5 XP 37 tried · 32 solved

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What Am I?

The Messenger

I begin my journey Long before your grandparents were born. Only when I reach your eyes Do you know I existed. What am I?

5 XP 2 tried · 2 solved

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What Am I?

The mountain tears

I am the mountain's tears that never dry, I cut the Earth but I am soft as silk. What am I?

5 XP 1 tried · 1 solved

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What Am I?

The memory stone

I am an animal that turned to stone, I waited millions of years to tell my story. What am I?

5 XP 1 tried · 1 solved

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What Am I?

The Timeless Fortress

I have countless rooms, yet no doors. I hold endless stories, yet never speak. The more you unlock me, the more I grow. What am I?

5 XP 1 tried · 1 solved

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What Am I?

The traveling seed

I travel without legs, I fly without wings, I wear a parachute but I am not a man. What am I?

5 XP 2 tried · 2 solved

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What Am I?

The electric snake

I live in the clouds, I strike without hands, I roar after I bite. What am I?

5 XP 2 tried · 2 solved

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What Am I?

The Upside Ocean

The Upside Ocean / Category: Space / Q: I am an ocean upside down, full of stars but no water, you look at me every night. What am I?

5 XP 2 tried · 1 solved

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What Am I?

The Invisible Prison

The stronger I become, The less you can escape. You build me yourself, Yet blame everyone else. What am I?

5 XP 2 tried · 2 solved

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What Am I?

The Honest Liar

I always tell the truth, Yet what I show is often false. Break me, and I reveal nothing. What am I?

5 XP 1 tried · 1 solved

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What Am I?

The Silent Judge

I follow every step you take, Yet never leave a single trace. Ignore me, and I disappear. Face me, and I mirror your grace. What am I?

5 XP 8 tried · 2 solved

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What Am I?

The Hidden Treasure

I have a heart that never beats, a home but never sleeps. I can take a man's house and build another's. What am I?

5 XP 8 tried · 3 solved

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What Am I?

A Curious Paradox

The more you take, the more you leave behind. What am I?

5 XP 7 tried · 7 solved

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What Am I?

The Cartographer's Secret

I have cities, but no houses; forests, but no trees; and rivers, but no water. What am I?

5 XP 8 tried · 7 solved

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What Am I?

The Brain's Last Warning

What can travel around the world while staying in the same corner?

5 XP 10 tried · 8 solved

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What Am I?

The Invisible Ocean

I am a localized field of high-frequency electromagnetic radiation. I bombard your room with billions of invisible microwaves per second, penetrating solid walls to deliver encrypted binary data from across the globe directly into the palm of your hand. What am I?

5 XP 9 tried · 8 solved

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What Am I?

The moon cycle

I shine more brightly with each passing night, Yet I am still not wearing my fullest light. More than half of me is glowing for your view, But perfection waits a little longer too. What am I?

5 XP 10 tried · 9 solved

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What Am I?

Last hope

I am the shade of a moonless night, I swallow nearly every light. In ink, in coal, and ravens' track, Name the color. what am I?

5 XP 11 tried · 11 solved

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What Am I?

Builder or Destroyer?

I connect the world without a road, Carry voices with no heavy load. I spread news, jokes, photos, and trends, Bringing strangers together as friends. I can inspire, entertain, or mislead— What am I?

5 XP 11 tried · 11 solved

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What Am I?

The neutralizer

I have no color, shape, or sound, Yet I rise and fall all around. I can freeze a lake or fuel a flame, Though you cannot see me all the same. Measured in degrees, both high and low. What am I?

5 XP 8 tried · 8 solved

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What Am I?

The destiny traveler

I begin with one, yet often become two. I carry no blueprints, but I copy what's true. In flowers, in fish, in people as well, I'm the ancient story that all life can tell. What am I?

5 XP 10 tried · 7 solved

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What Am I?

The Colorful Spirit

I look white to your eyes. But I hide many colors inside. Pass me through a glass triangle. And I reveal my secret. What am I?

5 XP 11 tried · 10 solved

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What Am I?

The invisible Power

I have no mouth, but I can roar. I have no lungs, but I can power cities. I can be trapped in a wire, Yet you can never see me. What am I?

5 XP 11 tried · 11 solved

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What Am I?

The Great Traveller

I leave the Sun every morning. I reach Earth in about eight minutes. Without me, there would be no colours, No shadows, And no life. What am I?

5 XP 12 tried · 12 solved

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What Am I?

The Invisible Shield

You cannot see me, You cannot touch me, Yet every compass follows me. Without me, Your phone speakers and electric motors would never work. What am I?

5 XP 10 tried · 6 solved

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What Am I?

Biggest university of lahore

What is the biggest university of lahore (goverment sector)

5 XP 13 tried · 4 solved

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What Am I?

Inventor of Brainrot

I am the inventor of brainrot and basic brainrot ever created.

5 XP 11 tried · 2 solved

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What Am I?

The Cold Void

A glow in the dark, A place without life, Where a small spark, Means the greatest strife. Where am I?_

5 XP 11 tried · 9 solved

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What Am I?

Tears of globe

I fall without jumping, speak without a voice, and vanish without leaving, I visit from above, yet never climb down. You hear me before you see me, and miss me when I leave. What am I?

5 XP 14 tried · 14 solved

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What Am I?

Beginning of the end

arrive when the Sun departs, yet darkness still waits, the lower I fall, the brighter I seem. I vanish below your eyes, yet never stop shining, I end the day without ending the light. What am I?

5 XP 11 tried · 11 solved

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What Am I?

The first sign of Humanity

Life has no price, but it is something to value and appreciate, you can break me without touching me. I keep you alive, yet I'm often given away. What am i?

5 XP 10 tried · 8 solved

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What Am I?

The biggest challenge

The more you live me, the less of me remains. I'm a journey everyone takes but no one walks the same path. I cannot be bought but i can be cherished everyday. What am i?

5 XP 13 tried · 13 solved

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What Am I?

Name the place

It is situated in lahore it is a Masjid where people also goes for friday and eid prayer it have 4 minar and it is made with red marble

5 XP 14 tried · 14 solved

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What Am I?

The Shining Block

I shine beneath the ground but never see the Sun. Mine me with the wrong tool, and I am gone forever. What am I?

5 XP 11 tried · 2 solved

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What Am I?

The Silent Keys

I have keys but no locks. I have space but no room. You can enter, but you can’t go inside. What am I?

5 XP 14 tried · 2 solved

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What Am I?

the greatest piece of fiction

I am greatest show ever created.

5 XP 12 tried · 10 solved

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What Am I?

The Hidden Architect

I have no hands, yet I build mountains. I cannot be seen, yet I move continents. Sometimes I shake the ground beneath your feet. I have been shaping Earth for millions of years. What am I?

5 XP 14 tried · 14 solved

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What Am I?

The Exclusive 25

Count me from 1 to 100 and you will find 25 of me. I can not split evenly except by 1 and me. Twin brothers I often have, like 11 and 13, or 71 and 73. What am I?

5 XP 16 tried · 12 solved

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What Am I?

The Endless Journey

I rise without wings, travel without feet, and return without getting lost. I change my form many times but remain the same substance. What am I?

5 XP 15 tried · 14 solved

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What Am I?

Nature's Tiny Ice Crystals

I am invisible until I become tiny crystals in the air. On very cold mornings, I sparkle like diamonds as I fall. What am I?

5 XP 15 tried · 11 solved

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What Am I?

Black Ash.

I'm not Alive, but i can grow. I don't have Lungs, but i need air, What Am I ?

5 XP 21 tried · 20 solved

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What Am I?

The Chaos

I increase disorder wherever I go The universe can never get rid of me.Guess what am I?

5 XP 23 tried · 20 solved

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What Am I?

The invisible massenger

I have no feet, yet I travel through space. I have no mouth, yet I can carry messages, music, and pictures. I can travel from the Sun to Earth and move incredibly fast. What am I?

5 XP 19 tried · 18 solved

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What Am I?

Dead or Alive?

I am alive. I am dead. I carry genetic information. But I can't metabolize independently. I can evolve. I can't reproduce on my own. Full of contradictions but a powerful enemy. What am I?

5 XP 23 tried · 21 solved

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What Am I?

The powerhouse currency

I have my own blueprint, separate from the master of the house. I consume fuel and oxygen all day, but I never catch fire. Instead, I mint the invisible coins that keep you moving. What am I?

5 XP 20 tried · 20 solved

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What Am I?

What am I

I have no mass yet I bend mass and time, I never sleeps yet I make every moment tick.

5 XP 22 tried · 14 solved

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What Am I?

The Endless dancer

I move without legs and never stop. Sometimes I am calm, sometimes I am powerful. What am I?

5 XP 26 tried · 19 solved

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What Am I?

The thirsty crown

I drink all day but have no throat. I wear a crown but cannot vote. I bring you joy the more I grow. What am I?

5 XP 24 tried · 20 solved

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PSC History

The legend

I am the one who made PSC

5 XP 2 tried · 0 solved

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PSC History

The Rocket's Base

I am a guided training roadmap inside the PSC portal. I contain exactly five missions designed to prepare you for your specific team role. What am I?

5 XP 12 tried · 11 solved

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Picture Riddle

Which Ice Cube Melts First?

Four identical ice cubes are placed on different materials at the same room temperature: A — Metal B — Wood C — Plastic D — Cloth

5 XP 12 tried · 12 solved

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Picture Riddle

Which glass has more water

Which glass has more water A B C D

5 XP 13 tried · 13 solved

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Picture Riddle

Nature’s Tiny Artist

Every one of us has six sides, but no two of us are exactly alike. What are we?

5 XP 22 tried · 12 solved

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Engineering Puzzle

The Final Piece

I am the very last block placed at the highest point of a curved arch. Even though I am just one single piece, if you remove me, the entire structure will collapse. What am I?

5 XP 9 tried · 9 solved

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Engineering Puzzle

The Ultimate Brain Teaser

2. The Invisible Traveler ⭐⭐⭐⭐⭐ The faster you chase me, the farther I seem. Stand still, and I arrive. I exist for everyone, but no one can keep me. What am I?

5 XP 10 tried · 10 solved

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Engineering Puzzle

The Shared Secret

I am a mathematical secret shared between two friends. I can lock your digital messages into a scrambled mess, and I am the only one who can unscramble them back to normal. What am I?

5 XP 15 tried · 13 solved

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Guess the Scientist

The Moon's First Visitor

I took a giant leap here no human had gone before. I walked on the world beyond Earth and left my mark in history. My famous words echoed across the world. Who am I?

5 XP 11 tried · 11 solved

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Guess the Scientist

The Curious Scientist

People laughed when I said Invisible living things cause disease. Today, Every hospital follows my ideas. Who am I?

5 XP 10 tried · 10 solved

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Guess the Scientist

The Lucky Accident

I was not looking for a cure, but a happy accident led me to one. A strange mold stopped bacteria from growing, and my discovery transformed modern medicine. Who am I?

5 XP 13 tried · 13 solved

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Guess the Scientist

The Curious Scientist

I looked through a telescope And discovered four moons around Jupiter. My observations changed how people viewed the universe. Who am I?

5 XP 14 tried · 13 solved

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Guess the Scientist

The Relativity Genius

I showed that time is not always the same, Space can bend, And energy can become matter. Who am I?

5 XP 13 tried · 12 solved

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Guess the Scientist

The Apple Thinker

An ordinary falling object made me ask an extraordinary question. I explained why the Moon never flies away, And why everything returns to Earth. Who am I?

5 XP 15 tried · 14 solved

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Guess the Scientist

The ignored one

I never saw what I proved. I spoke in ratios. Kings ignored me, but farmers grew my proof. I died unknown, but now every biology book starts with me

5 XP 21 tried · 17 solved

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Logic & Reasoning

What is the next number?

15, 12 ,36, 33, 99, 96,__

5 XP 11 tried · 11 solved

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Logic & Reasoning

What comes next

12, 10 ,20 ,18 , 36 , 34 , 68, 66, __

5 XP 14 tried · 14 solved

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Logic & Reasoning

The Endless Doubler

Feed me one, I become two. Feed me two, I become four. No matter how large I grow, I always keep the same habit. What rule am I following?

5 XP 16 tried · 9 solved

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Logic & Reasoning

What Comes Next?

What is the next letter in this sequence? O, T, T, F, F, S, S, E, ___

5 XP 13 tried · 13 solved

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Logic & Reasoning

Can You Find Me?

I stand alone, refusing to be broken except by those closest to me. Among the first 100 numbers, there are only 25 of us. I often travel with a twin, like 11 & 13 or 71 & 73. What am I?

5 XP 17 tried · 15 solved

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Logic & Reasoning

Sequence finding

What comes next in sequence 2,5,8,11,__,17,10

5 XP 18 tried · 18 solved

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Logic & Reasoning

What comes next in series

12 10 20 18 36 34

5 XP 25 tried · 25 solved

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Science Myth or Fact

The Great Equalizer

No matter where you go, I always try to make things the same. Hot becomes cold, High becomes low, Crowded becomes empty. What scientific idea am I?

5 XP 10 tried · 8 solved

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Science Myth or Fact

The Tiny Factory

I am found in every green leaf, Yet I am smaller than a grain of dust. Without me, There would be no forests, No fruits, And very little oxygen. What am I?

5 XP 11 tried · 3 solved

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Science Myth or Fact

The Cell's Librarian

I protect the instruction manual of life. I decide when a cell grows, Works, And divides. Without me, The cell loses control. What am I?

5 XP 10 tried · 10 solved

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Science Myth or Fact

The Invisible Traveler

I have no feet, yet I travel through space. I have no mouth, yet I can carry messages, music, and pictures. I can travel from the Sun to Earth in about 8 minutes. What am I?

5 XP 13 tried · 12 solved

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Mathematics

The Number That Never Lies

Multiply me by any number, And I stay exactly the same. Add me to any number, And nothing changes. Who am I?

5 XP 13 tried · 8 solved

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Mathematics

The age puzzle

In 2 years, I will be twice as old as I was 5 years ago. How old am I now?

5 XP 12 tried · 12 solved

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Mathematics

The brother of zero

I have no value alone, but with other numbers I become powerful. I am round like a ball. What am I?

5 XP 13 tried · 13 solved

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Mathematics

The silent one

I am an odd number. Take away one letter and I become even. What am I?

5 XP 11 tried · 11 solved

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Mathematics

The Square Group

A group of people collects Rs 529. If each person contributes an amount in rupees equal to the total number of people in the group, how many people are in the group?

5 XP 16 tried · 15 solved

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Mathematics

Guess my age

When i was 6 my brother was half my age now ,i am 20 , how old is my brother

5 XP 17 tried · 17 solved

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Mathematics

The Endless Number

I never end. I never repeat. You can never write all of me, Yet I begin with 3.14159... Who am I?

5 XP 15 tried · 15 solved

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Mathematics

The Impossible Cipher

I am a three-digit number. My digits multiply to 72 and add up to 15. When my digits are reversed, the new number is 198 less than me. What number am I?

5 XP 14 tried · 12 solved

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