Math Brain Teasers with Answers

I am a three-digit number. My tens digit is five more than my ones digit. My hundreds digit is eight less than my tens digit. What number am I?

If 7 students share 28 apples equally, how many apples does each student get?

Add me to myself and multiply by four. Divide me by eight and you’ll have me once more. What number am I?

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

A rectangle has a perimeter of 30 units. If the length is 11, what is the width?

Two fathers and two sons went fishing. They each caught a fish, but only three fish were in the bucket. How is that possible?

A pizza has eight slices. If you eat half the pizza, how many slices remain?

A number is multiplied by 2, then increased by 10, and the result is 34. What is the number?

If you add eight hours to 5 o’clock, what time do you get?

You have three coins that add up to 30 cents. One of them is not a nickel. What coins are they?

Which weighs more: a pound of quarters or a pound of dimes?

A snail climbs a 10-foot wall. Every day it climbs 3 feet but slides back 2 feet each night. How many days to reach the top?

What three positive numbers give the same result when multiplied as when added?

If five cats can catch five mice in five minutes, how long will it take one cat to catch one mouse?

How many 2-cent stamps are in a dozen?

A train 120 meters long crosses a bridge 180 meters long at 30 meters per second. How many seconds until the train clears the bridge?

You have a cube made of smaller cubes arranged 3×3×3. If you paint the outside and split it apart, how many small cubes have exactly one face painted?

What is the smallest whole number that is equal to seven times the sum of its digits?

If 6 workers can build a wall in 6 days, how long will it take 3 workers working at the same pace?

A number divided by 3 leaves a remainder of 2. When the same number is divided by 5, the remainder is 3. What is the smallest such number?