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20 Tricky Math Riddles with Keys

Tricky Math Riddles

Do you want to know how much you fond of math? Well, you can figure that out in few minutes. Just give it a try on our tricky math riddles collection to find out.

Tricky math riddles

Click “+” sign to know the answers. These math riddles are of mixed level and for all. Give it a try and find that answers are really tricky.

1. Two fathers and two sons go fishing. Each of them catches one fish. So why do they bring home only three fish?
Because the fishing group consists of a grandfather, his son, and his son’s son.

2. The day before yesterday I was 21 and the next year I will be 24. What day is my birthday?
31st December. It must be the 1st January, when I turned 22 and so 21 the day before. As it is now a new year, I will be 23 this year and so 24 next year.

3. I am an odd number. Take away a letter and I become even. What number am I?
Seven.

4. There are two ducks in front of two other ducks. There are two ducks behind two other ducks. There are two ducks beside two other ducks. How many ducks are there?
Four ducks (in a square).

5. Can you arrange four nines to make it equal to 100.
99+9/9 = 100.

6. I have two US coins totalling 55 cents. One is not a nickel. What are the coins?
A 50 cent piece and a nickel. The 50 cent piece is the coin is that is not a nickel!

7. If you can purchase 8 eggs for 26 cents, how many can you buy for a cent and a quarter?
Eight

8. The ages of a father and son add up to 66. The father’s age is the son’s age reversed. How old could they be (there are 3 possible solutions)?
42 and 24. 51 and 15. 60 and 6.

9. Why should you never mention the number 288 in front of anyone?
Because 288 is too gross. (A gross is 144, so 2 gross is 144 x 2 or 288).

10. Peter is 54 years old, and his father Joe is 80. How many years ago was Joe three times the age of his son Peter?
41 years ago.

11. There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
9 books.

12. What do you get when you divide 30 by 1/2 and add 10?
70

13. 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?
194

14. Using only addition, how can you add eight 8s to get the number 1,000?
888 + 88 + 8 + 8 + 8 = 1,000.

15. What 3 positive numbers give the same result when multiplied together as when added together?
1, 2 and 3.

16. One out of 9 otherwise identical balls is overweight. How can it be identified after 2 weighings?
Weigh a group of 3 balls against another group of 3, then you’ll know which group of 3 contains the heavy ball. Pick 2 balls from that group and weigh one against the other.

17. A man dies of old age on his 25th birthday. How is this possible?
He was born on February, 29th.

18. I asked a girl how old she was. She said, “In 2 years I will be twice as old as I was 5 years ago.” How old is she?
12

19. If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?
0.875

20. A farmer has 17 sheep and all but 9 die. How many are left?
9

How many math riddles you got correct?

Did you find these math themed riddles easy? How many of them you are able to answer. Please share your feedback, we will be glad to know.

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