We’re put together best math brain teasers which can be solved without even using a pen and paper!

1

What is the weight of each animal? 🐰 🛵

If two bears are 120kg, one bear is 60kg.

A bear and a rabbit are 70kg If the bear is 60kg alone, then the rabbit is 10kg.

Since the bear and the rabbit are 70kg, the weight remaining for the fox is 20kg.

If you managed to solve this question, then you should try our more advanced logical-mathematical brain teasers. Join MentalUP in two simple steps to compare your performance with your peer group.

MentalUP Brain Teasers: **Yes! I want to try them!**

2

This may not be a number. Think of a situation in everyday life where these numbers appear. 🧐

Let's give you a hint...

It's a lever in the car with numbers on it.

You guessed it, right?

Exactly! It’s a gear stick.

So the question mark will be replaced by the letter ‘R’.

Keep your mind fit with logical and mind-based brain exercises using MentalUP.

**MentalUP Brain Teasers: Try MentalUP!**

3

Can you count the number of circles that contain a black dot?

The correct answer is 12.

**MentalUP Brain Questions App: Try Now!**

4

I add five to nine and get two. The answer is correct, but how?

Answer: When it is 9 AM, add 5 hours to it and you will get 2 PM.

Want to solve more puzzle? Let’s try **MentalUP Brain Teaser App for FREE NOW!**

5

Make a true equation! 🧮

It was too easy!

Answer: 2 + 5 = 3 + 4

If you couldn’t find the answer don’t worry! You can make daily math practice with MentalUP Math Game: **I Want to Try MentalUP Math Games!**

6

Find out the numbers in the boxes! 🔢

We can form four equations

A+B = 8

C-D = 6

A+C = 13

B+D = 8

Let’s solve these four equations and find the variables A, B, C & D!

if we add the four equations

A+B+C-D+A+C+B+D = 8 + 6 + 13 + 8

2(A+B) + 2C = 35

2C = 35 - 2*8 (by replacing A+B)

2C = 35 - 16 = 19

C = 9.5

from 2nd Equation C - D = 6

D = C - 6

D = 9.5 - 6

D = 3.5

from 3rd equation

A+C = 13

A = 13 - C

A = 13 - 9.5

A = 3.5

from 4th equation

B + D = 8

B = 8 - D

B = 8 - 3.5

B = 4.5

7

Create an equation using the below numbers and mathematical symbols. ➗

The answer to our question is 4+5=3^{2}

Access 100’s math games for FREE: **Try MentalUP - Brain Teasers App**

8

What number should replace the question mark? 🤔

Follow the pattern below.

4^{1}=4

4^{2}=16

4^{3}=64

Well done! Do you like it? Many of them waiting for you in MentalUP with premium features: **I want to try MentalUP**

9

One of the most sweat-inducing questions. If you don't like mathematics, we suggest you skip this question. 🧐

You need to use factorials. 0! (zero factorial) equals 1.

Here, the process is as follows: (0! +0! +0!)! = (1 + 1 + 1)! = 3! = 6

MentalUP has more math mind puzzle for kids as well as for adults! **Try MentalUP Games Free**

10

What number should replace the question mark? ❓

After performing the multiplication, we reach the result by adding the individual numbers that make up the result.

If 12x12 = 144, then 1 + 4 + 4 = 9

If 23x23 = 529, then 5 + 2 + 9 = 16

If 34x34 = 1156, then 1 + 1 + 5 + 6 = 13

Couldn’t find the answer? You can always do brain exercises and improve your problem-solving skill easily with **MentalUP Brain Teasers App!**

11

If A, B, C, D and E represent different numbers, and none of them is zero, then what numbers are they? 🤓

There is a number in mathematics that when multiplied by 4, the opposite will appear.

This number is: 21978

So A = 2, B = 1, C = 9, D = 7, E = 8

Try MentalUP for more math brain puzzle: **MentalUP Brain Teaser App**

12

Which 4-digit number multiplied by 4 gives the same number in reverse? 💡

When multiplied by 4, the number 2178 is 8712.

Math riddles is a good exercise for your thinking skills! Agree? Then, we bet you’ll like MentalUP Brain Games: **Click Here to Play Brain Games!**

13

Can you find the missing number? 🎲

The number that should replace the question mark is 9. Why? The sum of the three numbers on each die equals the number written below it.

For the first die, for example: 8 + 4 + 7 = 19; for the second: 8 + 2 + 1 = 11. Following this pattern would explain why the third die is also 11 (5 + 5 + 1) and why the mysterious question mark should be 9 (4 + 3 + 2).

14

Only 2 per cent of people are able to solve this math puzzle. Can you be one of them? 🙄

The answer is 454585.

The calculation is like this:

9 5 5 =?

9×5 = 45 (first and second)

9×5 = 45 (first and third)

Sum of 45+45 = 90 and from this deduct center no i.e. 5 = 85

Like it? We have more than for you! **Click Here to Try and Boost Your Brain Skills with MentalUP**

15

Your parents have six sons including you and each son has one sister. How many people are in the family? 👨👩👦

Do you love logical maths problems? Then, it will come for you!

The answer is 9. Two parents, six sons, and one daughter.

Join MentalUP in two simple steps for more progressive and brain teasers, and measure your results against your peers. MentalUP Brain Teasers: **Yes! I want to try them!**

16

If 3 cats can catch 3 bunnies in 3 minutes, how long will it take 100 cats to catch 100 bunnies? 😺

It’s a tricky question to test your attention skills. It will take 3 minutes for 100 cats to catch 100 bunnies. 1 cat can catch 1 bunny in 3 minutes, so 100 catch can catch 100 bunnies in 3 minutes.

Check out MentalUP for more trick math question ❱❱ **MentalUP Brain Teasers**

17

How many times does the digit 5 occur in the numbers from 1 to 100? ⌚️

The answer is 20. The digit 5 appears ten times as the last digit (5, 15, 25 … 95) and ten times as a first digit (50, 51, 52 … 59).

Check out MentalUP for more fun maths brain puzzles ❱❱ **MentalUP Brain Teasers**

18

What number should replace the question mark? 💡

(A+B)=76

-A+B=-38

If it is added together, 2B=38, B=19 is found.

A = 57 if B = 19.

57/19= 3

MentalUP presents users to math puzzles with unique difficulties level to develop themselves constantly **Try MentalUP Puzzles Now!**

19

Mr Smith has 4 daughters. Each of his daughters has a brother. How many children does Mr Smith have? 🧒

He has 5 children. All of the daughters have the same 1 brother.

You’re doing great! You can continue with MentalUP app to see your detailed performance reports: **Start Now!**

20

What is the number of parking space containing the car? 🚘

This question was asked to 6-years-old for and elementary school entrance exam.

The answer is 87.

Check out MentalUP for more maths brain teasers ❱❱ **MentalUP Brain Teasers**

21

Connect the dots with no more than 4 straight lines without lifting your hand from the paper. ✍️

22

‘You have 1000 add 40 riddle’ is so popular these days.⭐️

Note: This must be done in your head only. It isn’t easy as you see. Try it!

The answer is 87.

Check out MentalUP for more maths brain teasers ❱❱ **MentalUP Brain Teasers**

23

Can you find the car in the picture full of snails and toadstools? 🚙

24

How many numbers do you see here? 🔢

The answer is 10.

When you look carefully at the image, you’ll see the 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

If you’re thinking, “I trust my logic skills and want to compare my scores with my peer group”, then join MentalUP with two simple steps!

MentalUP Brain Teasers: **Start Now!**

25

Can you find out how many people are in this family? 👨👩

(Dad + Mom + Four Daughters + 1 Son)

The answer is 7.

26

Only one in a thousand will figure it out. What about you? 😅

The first equation is true, the second and third are false, and the answer to the equation should be 19.

Math puzzles like this aren’t about literally interpreting mathematical symbols. They are about identifying a pattern in the set of equations and applying it to the unknown.

So, add the first number to the product of the two numbers to get the answer.

a + b means a + ab

This works for the known equations.

1 + 4 means 1 + 1(4) = 5

2 + 5 means 2 + 2(5) = 12

3 + 6 means 3 + 3(6) = 21

Applying the pattern to the last equation gives the answer of 96.

8 + 11 means 8 + 8(11) = 96

27

It’s a hard math puzzle! Don’t worry, we think you will find the answer if you give a shot! 🚰

The first tank to fill up will be the third one, then the fourth and further the second and the first.

For more math puzzle questions, click the link and start using MentalUP: **Launch MentalUP**

28

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be? 😮

The person was born in 2005 BC.

Test yourself with visual brain teasers and other areas with MentalUP: **MentalUP Brain Games!**

29

What is 1000 + 40 + 1000 + 30 + 1000 + 20 + 1000 + 10? 👀

The first tank to fill up will be the third one, then the fourth and further the second and the first.

For more math puzzle questions, click the link and start using MentalUP: **Launch MentalUP**

30

Proceeding up the staircase, the numbers form a logical sequence. What number belongs on the top step? 🕵️

Answer: 840

Each number is found by multiplying the number that corresponds to its step by the number that precedes it.

Need to improve your math skills? Then why don’t you make it fun and educational with using MentalUP? ❱❱ **Click here to Try MentalUP!**

Math brain teasers for adults & kids are compelling intelligence exercises. Solving such questions frequently is an excellent way to increase your intelligence.

You will need more mathematical puzzles and brain puzzles to improve your analytical thinking skills. Don’t worry. There is a free app that you can access 100’s of brain teasers ❱❱ **Try MentalUP Math Brain Teasers App!**

Don’t want to download an app? Then check it out:
**Brain Puzzles**