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**Brain Teasers Math Riddles with Answers PDF**In everyone life, Mental health is also important as physical health. For this, you need to exercise your brain. Therefore, Math Riddles or Math puzzles are the funniest way to exercise of brains. Nothing is better than solving a Math Riddles or Math puzzles.

This article is a collection of math riddles for kids, math riddles for kindergarten, math riddles for first graders etc.

To solve any math riddle, you need to use some fun strategies while approaching the solution of math riddles or math puzzles. Sometimes you need to pay some concentration, apply critical thinking, and logical reasoning to solve these math riddles or math puzzles.

Now, there are following math riddles with answers.

Contents

- 1 Brain Teasers Math Riddles Puzzles with Answers Easy Hard Tricky
- 2 Easy Math Riddles with Answers
- 3 Hard Math Riddles with Answers
- 4 Tricky Math Riddles with Answers
- 5 Math Riddles with Pictures
- 6 Math Riddles for Kids with Answers
- 7 Math Riddles for Kindergarten with Answers
- 8 Math Riddles for First Graders with Answers
- 9 Math Riddles for Second Graders with Answers
- 10 Math Riddles for Third Graders with Answers
- 11 Math Riddles for Fourth Graders with Answers
- 12 Math Riddles for Fifth Graders with Answers
- 13 Math Riddles for Sixth Graders with Answers
- 14 Math Riddles for Seventh Graders with Answers
- 15 Math Riddles for Eighth Graders with Answers
- 16 Math Riddles for Ninth Graders with Answers
- 17 Math Riddles for Tenth Graders with Answers
- 18 Math Riddles for Teens with Answers
- 19 Math Riddles for Middle High School Students with Answers
- 20 Math Riddles for High School Students with Answers
- 21 Math Riddles for Adult with Answers

## Brain Teasers Math Riddles Puzzles with Answers Easy Hard Tricky

## Easy Math Riddles with Answers

**Easy Math Riddle 1 with Answer** : Using only addition, how can you add eight 8s to get the number 1,000?

**Show/Hide Answer**

888 + 88 + 8 + 8 + 8 = 1000

**Easy Math Riddle 2 with Answer** : A man is twice as old as his little sister. He is also half as old as their dad. Over a period of 50 years, the age of the sister will become half of their dad’s age. What is the age of the man now?

**Show/Hide Answer**

He is 50 years old

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## Hard Math Riddles with Answers

**Hard Math Riddle 1 with Answer** : A grandfather, two fathers and two sons went to the movie theater together and everyone bought one movie ticket each. How many tickets did they buy in total?

**Show/Hide Answer**

3 (the grandfather is also a father and the father is also a son)

**Hard Math Riddle 2 with Answer** : If it took 8 people 10 hours to build a barn, how long would it take 14 people to build the same barn?

**Show/Hide Answer**

None — the barn is already built

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## Tricky Math Riddles with Answers

**Tricky Math Riddle 1 with Answer** : Jack lives at the reverse of Mack’s house number. The difference between our house numbers ends in two. What are the lowest possible numbers of our house?

**Show/Hide Answer**

The lowest possible numbers for our house are 19 and 91

**Tricky Math Riddle 2 with Answer** : In ‘the alphabet, there are x letter, where x is not 26.’ Find x.

**Show/Hide Answer**

In ‘the alphabet’ there are 11 letters. Thus, x = 11.

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## Math Riddles with Pictures

**Math Riddle 1 with Pictures** : The number 4 is half of 5 How?

**Math Riddle 2 with Pictures** : I have three letters. Remove first letter, I become stronger. Remove first two letters, I become 10. What I am?

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## Math Riddles for Kids with Answers

**Math Riddle 1 for Kids with Answer** : I am an odd number. Take an alphabet away from me and I become even. Who I am?

**Show/Hide Answer**

Seven (Seven-S=Even)

**Math Riddle 2 for Kids with Answer** : If it took 15 people 20 hours to build a wall, how long would it take 24 people to build the same barn

**Show/Hide Answer**

None — the wall is already built!

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## Math Riddles for Kindergarten with Answers

**Math Riddle 1 for Kindergarten with Answer** : I am a number between zero and ten. I am more than two. I am before four. Who I am?

**Show/Hide Answer**

3 (Three)

**Math Riddle 2 for Kindergarten with Answer** : What can you put between a 7 and an 8 so that the result is greater than 7, but less than 8?

**Show/Hide Answer**

Put a decimal point between 7 and 8, that is 7.8. (7 < 7.8 < 8)

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## Math Riddles for First Graders with Answers

**Math Riddle 1 for First Graders with Answer** : Why do plants hate math?

**Show/Hide Answer**

Math gives them a square ROOT.

**Math Riddle 2 for First Graders with Answer** : What did one math book say to other?

**Show/Hide Answer**

Don’t disturb me, I have my a lot of problems.

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## Math Riddles for Second Graders with Answers

**Math Riddle 1 for Second Graders with Answer** : If a hen and a half lay an egg and a half in a day and a half, how many eggs will half a dozen hens lay in half a dozen days?

**Show/Hide Answer**

Two dozens

**Math Riddle 2 for Second Graders with Answer** : You have two coins. Added together, they equal 15 cents, but one it not nickel. How is that possible?

**Show/Hide Answer**

The other one is nickel.

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## Math Riddles for Third Graders with Answers

**Math Riddle 1 for Third Graders with Answer** : What is the next number in the sequence below? 1, 4, 9, 16, 25, 36, …

**Show/Hide Answer**

1^{2} = 1, 2^{2} = 4, 3^{2} = 9, 4^{2} = 16, 5^{2} = 25, 6^{2} = 36, so next term is 7^{2} = 49

**Math Riddle 2 for Third Graders with Answer** : You have two coins. Added together, they equal 15 cents, but one it not nickel. How is that possible?

**Show/Hide Answer**

The other one is nickel.

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## Math Riddles for Fourth Graders with Answers

**Math Riddle 1 for Fourth Graders with Answer** : How many volumes of dirt are in a PVC pipe of 50-meter-long and 30 meter wide?

**Show/Hide Answer**

The volume is zero because the pipe is empty.

**Math Riddle 2 for Fourth Graders with Answer** : How can you write eleven thousand eleven hundred and eleven in numbers?

**Show/Hide Answer**

11000 + 1100 + 11 = 12111

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## Math Riddles for Fifth Graders with Answers

**Math Riddle 1 for Fifth Graders with Answer** : What is occur once in every minute, twice in every moment, and never in a thousand years?

**Show/Hide Answer**

Letter M.

**Math Riddle 2 for Fifth Graders with Answer** : Divide 250 into two so that one will be 400 percent of the other. What are the numbers?

**Show/Hide Answer**

50 and 200

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## Math Riddles for Sixth Graders with Answers

**Math Riddle 1 for Sixth Graders with Answer** : What will be the sign of the product if you multiply together 201 negative numbers and 20 positive numbers?

**Show/Hide Answer**

Negative

**Math Riddle 2 for Sixth Graders with Answer** : A rope of length 39/4 m is cut into 6 pieces of equal length. Find the length of the each piece.

**Show/Hide Answer**

13/8 m

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## Math Riddles for Seventh Graders with Answers

**Math Riddle 1 for Seventh Graders with Answer** : If A : B = 2 : 3 and B : C = 5 : 7, then find the ratio A : B : C.

**Show/Hide Answer**

A : B : C = (2×5) : (3×5) : (3×7) = 10 : 15 : 21

**Math Riddle 2 for Seventh Graders with Answer** : A number is decreased by 40% gives 180. Find the number.

**Show/Hide Answer**

300

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## Math Riddles for Eighth Graders with Answers

**Math Riddle 1 for Eighth Graders with Answer** : What is the next number in the sequence below? 1, 4, 9, 16, 25, 36, …

**Show/Hide Answer**

12 = 1, 22 = 4, 32 = 9, 42 = 16, 52 = 25, 62 = 36, so 72 = 79

**Math Riddle 2 for Eighth Graders with Answer** : You have two coins. Added together, they equal 15 cents, but one it not nickel. How is that possible?

**Show/Hide Answer**

The other one is nickel.

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## Math Riddles for Ninth Graders with Answers

**Math Riddle 1 for Ninth Graders with Answer** : A’s income is 60% more than of B’s. By what percent is B’s income less than A’s?

**Show/Hide Answer**

37.5%

**Math Riddle 2 for Ninth Graders with Answer** : If 1A2B5 is exactly divisible by 9, then find the least value of (A + B).

**Show/Hide Answer**

Least value of (A + B) = 1

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## Math Riddles for Tenth Graders with Answers

**Math Riddle 1 for Tenth Graders with Answer** : Five people were eating chocolates, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order?

**Show/Hide Answer**

Putting the first three in order, A finished before B but behind C, so CAB. Then, we know D finished before B, so CABD. We know E finished after D, so CABDE.

**Math Riddle 2 for Tenth Graders with Answer** : A man has 53 socks in his drawer: 21 identical blue, 15 identical black and 17 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100 percent certain he has at least one pair of black socks?

**Show/Hide Answer**

40 socks. If he takes out 38 socks (adding the two biggest amounts, 21 and 17), although it is very unlikely, it is possible they could all be blue and red. To make 100 percent certain that he also has a pair of black socks he must take out a further two socks.

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## Math Riddles for Teens with Answers

**Math Riddle 1 for Teens with Answer** : If 2 + 2 = 44, 3 + 3 = 96, 4 + 4 = 168, 5 + 5 = 2510, then what is the value of 6 + 6?

**Show/Hide Answer**

6 + 6 = (6×6)(6+6) = 3612

**Math Riddle 2 for Teens with Answer** : If 5 + 5 = 52, 6 + 6 = 63, 7 + 7 = 94, 8 + 8 = 46, then find the value of 9 + 9.

**Show/Hide Answer**

9 + 9 = 18.

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## Math Riddles for Middle High School Students with Answers

**Math Riddle 1 for Middles High School Students with Answer** : If there are 70 students in your class and you shake every student’s hand when you arrive, how many handshakes will you have to make?

**Show/Hide Answer**

69 handshakes

**Math Riddle 2 for Middles High School Students with Answer** : You have 10 rose bushes and need to plant them in 5 rows. Each row has to have 4 bushes. How would you do this?

**Show/Hide Answer**

Plant the bushes in the shape of a star.

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## Math Riddles for High School Students with Answers

**Math Riddle 1 for High School Students with Answer** : With the numbers 123456789, make them add up to 100. They must stay in the same order. You can use addition, subtraction, multiplication, and division. Remember, they have to stay in the same order.

**Show/Hide Answer**

1+2+3+4+5+6+7+(8×9) = 100.

**Math Riddle 2 for High School Students with Answer** : If 1 + 9 + 8 = 1, then find the value of 2 + 8 + 9.

**Show/Hide Answer**

First Letter: 1(**O**ne) + 9(**N**ine) + 8(**E**ight) = **ONE** = 1. So, 2(**T**wo) + 8(**E**ight) + 9(**N**ine) = **TEN** = 10

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## Math Riddles for Adult with Answers

**Math Riddle 1 for Adult with Answer** : What’s the angle between the minute hand and hour hand at a quarter past three?

**Show/Hide Answer**

The angle is 7.5 degrees.

**Math Riddle 2 for Adult with Answer** : If you count 20 houses on your right going to school and 20 houses on your left coming home, how many houses did you count?

**Show/Hide Answer**

20 houses, since the houses on your right would be the same houses on your left while coming back.

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