Riddles
Stuff people just don't know
Math
Random
Electronics
100

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

What is a map?

100

How much percent of your body is replaced every day?

What is 1%?

100

The ratio of cats to dogs is 3:5. If there are 40 animals total, how many cats are there?

What is 15 cats?

100
How many time zones are in Russia?

What are 11 time zones?

100

What is more powerful every computer used by NASA to land humans on the moon, or your phone?

What is your phone?

200

I’m light as a feather, yet the strongest person can’t hold me for much longer than a minute. What am I?

What is your breath?

200

What is the most dense?

Neutron stars, Mount Everest, or Kevlar

What is a neutron star?

200

A recipe uses 2 cups of sugar for every 5 cups of flour. If you use 17.5 cups of flour, how much sugar do you need?

What is 7 cups?

200

How many watts does your brain run on?

What is about 20 watts?

200

What are CAPTCHA tests for?

What is teaching AI?

300

I speak in symbols, yet I have no tongue. I build up towers from nothingness sprung.

I measure the endless, make chaos seem small. Without me, your science would surely just fall.

What am I?

What is math?

300

You have 3 apples. You take away 2.

How many do you have?

What is 2 apples?

300

A map scale is 1 inch = 3 miles. If two towns are 4.5 inches apart on the map, how far apart are they in real life?

What is 13.5 miles?

300

What existed first, shark, trees, or jawed fish?

What are sharks?

300

Why is it almost impossible to make blue LED?

Why is it that blue light has high energy?

400

I have four legs, but cannot walk. I often listen but never talk. I’m pulled out when it’s time to eat or when guests need a place to sit. I stand in rows, columns, and pairs. What am I, built for backs and rears?

What is a chair?

400

What animal has no knees? 

Penguin, a cardinal, centipedes

What is a centipede?

400

5 + 3x = 5x − 7

What is x?

What is 6?

400

Where are the most pyramids?

Where is Sudan?

400

What does Wi-Fi stand for?

What is a trick question?

It doesn't stand for anything.

500

I’m not alive, but I grow. I don’t have lungs, but I need air. I don’t have a mouth, but water kills me. What am I?

What is fire?

500

Which of the following has red blood?

Octopus, shrimp, or freshwater snails.

What are freshwater snails?

500

10 − 2x = 4(3−x)

What is 1?

500

What is the most dirty?

Toilet, phone, keyboard.

What is phone?

500

What do batteries store?

What is chemistry?

(It produces electrons not stores it.)