# Math Riddles with Answers

Source: https://silverapuzzles.com/riddles/math

## There are three apples and you take away two. How many apples do you have?

**Answer:** Two. You took two apples, so you have two.

https://silverapuzzles.com/riddles/there-are-three-apples-and-you-take-away-two-how-many-apples-do-you-have

## A farmer has 17 sheep, and all but 9 run away. How many are left?

**Answer:** Nine. “All but 9” means 9 of them stayed.

https://silverapuzzles.com/riddles/a-farmer-has-17-sheep-and-all-but-9-run-away-how-many-are-left

## What do you get if you multiply all the numbers on a phone keypad?

**Answer:** Zero. The keypad includes 0, and anything multiplied by 0 is 0.

https://silverapuzzles.com/riddles/what-do-you-get-if-you-multiply-all-the-numbers-on-a-phone-keypad

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

**Answer:** Seven. Remove the S from “seven” and you get “even”.

https://silverapuzzles.com/riddles/i-am-an-odd-number-take-away-one-letter-and-i-become-even-what-number-am

## How can you add eight 8s to get 1,000?

**Answer:** 888 + 88 + 8 + 8 + 8. 888 + 88 + 8 + 8 + 8 = 1,000.

https://silverapuzzles.com/riddles/how-can-you-add-eight-8s-to-get-1-000

## What is half of two plus two?

**Answer:** Three. Half of two is one, and one plus two is three.

https://silverapuzzles.com/riddles/what-is-half-of-two-plus-two

## When I was six, my sister was half my age. Now I am 70. How old is my sister?

**Answer:** 67. She was three years younger then and is still three years younger: 67.

https://silverapuzzles.com/riddles/when-i-was-six-my-sister-was-half-my-age-now-i-am-70-how-old-is-my

## Which is heavier: a pound of feathers or a pound of bricks?

**Answer:** Neither. A pound is a pound, whatever it is made of.

https://silverapuzzles.com/riddles/which-is-heavier-a-pound-of-feathers-or-a-pound-of-bricks

## A bat and a ball cost $1.10 together. The bat costs $1.00 more than the ball. How much is the ball?

**Answer:** 5 cents. If the ball is 5 cents, the bat is $1.05: together $1.10, and the bat costs exactly $1.00 more.

https://silverapuzzles.com/riddles/a-bat-and-a-ball-cost-1-10-together-the-bat-costs-1-00-more-than-the

## How many sides does a circle have?

**Answer:** Two, inside and outside. A circle has an inside and an outside.

https://silverapuzzles.com/riddles/how-many-sides-does-a-circle-have

## What comes next: 1, 1, 2, 3, 5, 8, 13…?

**Answer:** 21. Each number is the sum of the two before it, and 8 + 13 = 21.

https://silverapuzzles.com/riddles/what-comes-next-1-1-2-3-5-8-13

## Which three positive whole numbers give the same result when added together as when multiplied together?

**Answer:** 1, 2 and 3. 1 + 2 + 3 = 6 and 1 × 2 × 3 = 6.

https://silverapuzzles.com/riddles/which-three-positive-whole-numbers-give-the-same-result-when-added

## What has six faces and 21 eyes but cannot see?

**Answer:** A die. A die has six faces, and its dots add up to 1 + 2 + 3 + 4 + 5 + 6 = 21.

https://silverapuzzles.com/riddles/what-has-six-faces-and-21-eyes-but-cannot-see