23 Math Riddles

 23 Math Riddles

1.Riddle: I am an odd number. Take away a letter and I become even. What number am I?

Answer: Seven

2.Riddle: If two’s company, and three’s a crowd, what are four and five?

Answer: Nine

3.Riddle: What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Answer: One, two and three

4.Riddle: Mary has four daughters, and each of her daughters has a brother. How many children does Mary have?

Answer: Five—each daughter has the same brother.

5.Riddle: Which is heavier: a ton of bricks or a ton of feathers?

Answer: Neither—they both weigh a ton.

6.Riddle: Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Answer: None. He has three sisters.

7.Riddle: Two fathers and two sons are in a car, yet there are only three people in the car. How?

Answer: They are a grandfather, father and son.

8.Riddle: The day before yesterday I was 21, and next year I will be 24. When is my birthday?

Answer: December 31; today is January 1.

9.Riddle: A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

Answer: Three

10.Riddle: A man describes his daughters, saying, “They are all blonde, but two; all brunette but two; and all redheaded but two.” How many daughters does he have?

Answer: Three: A blonde, a brunette and a redhead

11.Riddle: If there are three apples and you take away two, how many apples do you have?

Answer: You have two apples.

12.Riddle: A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Answer: Four sisters and three brothers

13.Riddle: If 2 is company and 3 is a crowd, what are 4 and 5?

Answer: 9.

14.Riddle: I add 5 to 9 and get 2. The answer is correct, so what am I?

Answer: A clock. When it is 9 a.m., adding 5 hours would make it 2 p.m.

15.Riddle: Rachel goes to the supermarket and buys 10 tomatoes. Unfortunately, on the way back home, all but 9 get ruined. How many tomatoes are left in a good condition?

Answer: 9.

16.Riddle: What is 3/7 chicken, 2/3 cat, and 2/4 goat?

Answer: Chicago!

17.Riddle: If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Answer: 977 animals (100 x 2 = 200; 200 + 800 = 1000; 1000 – 23 = 977)

18.Riddle: I saw my math teacher with a piece of graph paper yesterday.

Answer: I think he must be plotting something.

19.Riddle: If you multiply this number by any other number, the answer will always be the same. What number is this?

Answer: Zero

20.Riddle: I am an odd number. Take away a letter and I become even. What number am I?

Answer: Seven.

21.Riddle: What 3 numbers give the same result when multiplied and added together?

Answer: 1, 2, and 3 (1 + 2 + 3 = 6 and 1 x 2 x 3 = 6).

22.Riddle: What's a single-digit number with no value?

Answer: Zero.

23.Riddle: A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Answer: Nine years.