Brain teasers and logic riddles play an important role especially in the mental development of high-school children. Let’s have a look at some of the best riddles with answers we’ve compiled for you and your kids:

1

How many circles contain the black dots?

12 circles

MentalUP Educational Brain Teasers helps you and your kids do the brain exercise you need daily with fun riddles for all ages:

2

What is our weight?

Dog=17 kg, cat and rabbit= 10 kg. The answer is 27 kg.

MentalUP supports your mental development with 15 minutes of riddles specially customized for you and your child's level of mental skills such as problem-solving, math, and logic.

3

Can you solve the equation?

4

Move just 2 matchsticks to make the equation correct!

9-9=0. Move one from the addition sign to make it a subtraction sign, and put it to 3 to make 9, 2. move one from 8 to make it 9.

Start using MentalUP in two simple steps to improve yourself with gradually difficult math questions and follow your progress reports:

5

Can you find the missing number?

The answer is 3.

MentalUP offers fun educational brain teasers specially prepared by academics and child development experts for children of all ages:

6

Can you move four matchsticks to form three squares?

All of them are interesting, fun, and thought-provoking. Discover math riddles that are waiting for you on MentalUP now.

Children need to solve different brain teaser puzzles and logic riddles based on their age and educational level. If you give a middle-school child extremely hard or impossible math riddles to solve, this may undermine his self-confidence. We have listed the math and logic riddles that are suitable for your child according to the grades:

1

Each ball has the value shown in the boxes below. Write the total of each horizon and vertical line of balls!

10+ million families prefer MentalUP to support their children’s development.

2

There are 5 bags with 1,2,3,4,5 balls inside and two sizes of boxes. Put the bags into the boxes in a way that the big box has twice the number of balls than the smaller box. Find out all of the 3 ways to do so!

If you are looking for math riddles with answers to freshen up your brain by doing a daily exercise, be sure to check out this five star rating app! ⭐

1

Mark all 3 numbers that stand horizontally or vertically next to each other and make 10 when you add them.

Easy and fun math exercises for all ages! Download MentalUP now to start sharpening your brain.

2

How many triangles can you count in this shape?

There are 13 triangles!

MentalUP allows children to learn while having fun and increase their academic success while contributing to their mental development.

1

How would you place the numbers 10, 20, 30, 40, 50, 60, 70 and 80 so that each side of the square adds up to 150?

100s of educational games + no-ads. Click here to get your first month free!

2

How would you place the numbers 2, 4, 6, 8, 10, 12 and 16 so that the numbers in the hexagon are equal to the two numbers in the circles added together on either side.

There are 8 total possible solutions. 2 of the solutions are as below. The other 6 solutions are simply the rotated versions of those two.

A trusted and safe learning program that choice of 10 million families. KidSafe & No-Ads!

1

How would you place the numbers from 1 to 6 to get the product?

Help your child to do math practice and play! Try MentalUP for kids now.

2

Each number in the hexagons is the sum of the two numbers below it. So what should be placed in the top hexagons?

1

Here is a magic square in which each line of 3 numbers adds up to the same amount vertically, horizontally or diagonally. The total must be 7½. How will you place the numbers 0, ½, 1, 1½, 2, 2½, 3, 3½, 4, 4½?

Whether it's weaker math skills, concentration or thinking too slowly - only 25 minutes of training a day can make problems disappear and give your brain new momentum.

2

Start the maze with 0 and finish it with a total of 10. You can move to the right or down each turn. Find 3 different ways to do so!

Don’t you want to improve your math skills and solve all riddles easily? So, let’s try MentalUP!

1

If the same proportion holds, what is the value of 1/3 of 10?

2

A merchant can place 8 large boxes or 10 small boxes into a carton for shipping. In one shipment, he sent a total of 96 boxes. If there are more large boxes than small boxes, how many cartons did he ship?

7 large boxes (7 x 8 = 56 boxes)

4 small boxes (4 x 10 = 40 boxes)

So the answer is **11 total cartons** for 96 boxes

The most educational brain games app for kids!

1

Can you find the missing number?

The answer will be 2. Look at how many closed areas there are.

9999 has 4 closed areas (the top of the '9').

8888 has 8 closed areas (the top and bottom parts of 8 and there are no other digits).

1816 has 3 closed areas (top and bottom of 8 and bottom of 6, and it has 2 other digits (3 * 2 = 6)).

1212 has 0 closed areas, (0 * 4 = 0).

2

How can you add eight 8's to get the number 1,000? (only use addition).

The key to this math riddle is realizing that one place must be zero. 888 + 88 + 8 + 8 + 8 = 1,000

With over 10+ million users worldwide, MentalUP is recommended by many schools to support the mental development of secondary-school children and to strengthen their post-school education:

1

A 35-year-old woman has 3 children. If you multiply the 3 children's ages, you get 36. If you add up the children's ages it's 13. And her oldest child plays basketball for 3 years.

How old are the kids?

They are 2, 2, and 9.

If you list out the trio of factors that multiply to 36, you get:

1 1 36 = 38

1 2 18 = 21

1 3 12 = 16

1 4 9 = 14

6 6 1 = 13

2 2 9 = 13

2 3 6 = 11

3 3 4 = 10

If the sum is 13, as you can see, there are 2 options. When she says her 'oldest' you know it cannot be {6, 6, 1} since she would have two 'older' sons, not an 'oldest'.

2

An athlete is jumping. However, every time she jumps she gets a bit more tired, and every jump goes 1/2 as far as her prior jump. Now, for her very first jump, she goes 1/2 of a foot. On her second jump, she goes 1/4 of a foot, and so on and so forth. How many jumps does it take for her to travel 1 foot?

She will never get to the 1-foot mark because you keep adding smaller and smaller amounts!

support your kids' development with completely educational content prepared by doctors, without exposure to any ads!

Fun math riddles for adults is one of the best-known ways to keep your mind fresh. Since mathematics riddles make our brain muscles work, these are the exercises that adults generally prefer. Check out the best maths riddles for adults listed below:

1

Can you solve the equation?

The answer is 252,

A⁴= 2⁴-2, B⁴=3⁴-3 so following the same pattern C⁴=4⁴-4=252.

Do you want to improve your math skills? MentalUP gives you a chance to daily challenging your mind.

2

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).

Millions of adults improve their cognitive skills like attention, memory, word/language, math skills and problem-solving with MentalUP.

3

Move the numbers from the outer frame onto the board so they snake together vertically, horizontally, or diagonally in sequence from 1 to 25. (For example, 2 must touch both 1 and 3.) The catch: You can only move a number in the direction indicated on its home square. Each number fits in its own cell.

Can’t find the answers? Do brain exercises and improve your problem-solving skill with MentalUP!

4

A whole number between one and seven belongs in each of the seven bubbles. Each number occurs once. The sums of some of the numbers are revealed in the areas where their bubbles overlap.

Can you figure out which number goes in each bubble?

Use the MentalUP app for more fun math riddles! Do daily brain exercises, track your progress and measure your performance in different cognitive skills.

5

Which glass will be filled first?

3

Because of the glasses, 5, 6 and 7 got a blocked connection. Now, since the connection to 3 is lower than that of 2, it will fill first while the remaining glasses will remain empty.

Use the app for more questions and exercises:

6

How many squares are there in a chessboard?

The answer is 204🙋

Looking for more math brain teasers? Look no further. Here’s the #1 brain teasers app in the world:

7

An easy peasy math riddle for adults! How fast can you find the hidden pattern?

Would you like to do a simple math quiz test for your child or yourself? Say, no more!

8

How can we add 15 matchsticks in the picture below to create four areas of equal size? These kinds of math riddles for adults which will surely bring out the angry side of you!

Let's test your brain with math riddles! This app will help you challenge your inner child and improve your intellectual skills.

9

Challenge yourself with fun math riddles for adults: How many triangles can you find in this picture?

It’s your turn. Don’t just watch, take action. Download MentalUP to test, train and improve your mind with over 100 tricky math riddles.

10

This is one of the best fun math riddles for adults to keep them entertained: If you can move only 3 circles, can you turn it upside down?

Do you want to keep your brain fit with riddles? Then, MentalUP is just for you! Game-like exercises + new content added regularly.

Looking for incredibly challenging math riddles? Challenge is always good for our brains but there are really impossible math riddles that are just designed for geniuses! Here are some great examples of hard but not impossible ones for you:

1

Can you solve the equation?

Consider, number as: A + B + C

Now they are following this pattern: A + B + C = [AxB] [AxC] [(AxB)+(AxC)-(B)]

Where: [AxB] = First two digits

[AxC] = Further two digits [(AxB)+(AxC)-(B)] = Last two digits

E.g.: 5 + 3 + 2 =

First two digits: 5×3= 15

Further two digits: 5×2= 10

Last two Digits: 15 + 10 = 25 – 3(middle number from question) = 22

So, we get 5 + 3 + 2 = 151022

Same as: 7 + 2 + 5 = 143547

Millions of kids to improve their cognitive skills with using MentalUP. Join them now for free!

2

You are running a race with three persons. You overtake the secondlast person, what position are you in NOW?

If your reply is the 2nd position, then you are just trapped in this puzzle trick just like many. The correct answer is the 3rd Position. You are running a race with three persons, that means the total number of people running in this race is four, and you passed the second-last person (i.e. The Third-person). Now you are in the third position.

Quick and fun math learning games that sharpen the players’ math and counting skills. Academic approach. Entertaining & Scientific games + no-ads.

3

Can you find the value of the missing number?

The Answer is 14.

The outer number is the sum of the numbers in the two segments immediately across the line connecting big Circle to small Circle.

MentalUP presents users to visual riddles with unique difficulties level to develop themselves constantly. 10+ million families prefer MentalUP to support their children’s development.

4

Can you find the number?

The second digit is not important for the result.

Result =

first digit * first digit

third digit * third digit

398 = 964 (3*3 8*8)

118 = 164 (1*1 8*8)

356 = 936 (3*3 6*6)

423 = 169 (4*4 3*3)

In MentalUP Educational Brain Teasers App there are games at all levels.

5

How can you make the following equation true by drawing only one straight line:

Draw a line on the first plus sign. This turns it into a 4! The equation then becomes correct: 545+5=550.

A trusted and safe learning program that features 100s of math riddles: try MentalUP Premium for free now!

6

All the math nerds! Here is a good challenge for you.

A = 6. B = 10. C = 18. D = 33

If you couldn’t find the answer don’t worry. MentalUP App has 100s of math riddles and games for you:

7

There are 12 checkers on a table, arranged as shown. Four adjacent checkers can be united in a square. Including the one outlined, how many possible groupings are there of four checkers that form a square?

Discover more math riddles with answers! MentalUP features 100s of them easy + no-ads! 😊 🧠

8

These kind of challenging math riddles aren't easy to solve. Do you think you know the answer to this one?

You might start doing some elaborate fractions but hard riddles like this are sometimes much more about word play than crunching the numbers.

Think literally and the answer may just appear right before your eyes. Answer: IV, the Roman numeral for four, which is “half” (two letters) of the word five.

MentalUP has interactive math puzzles and math games for all kids as well as for adults!

When it comes to riddles, the sky's the limit! You can even find Christmas, Thanksgiving or Halloween math riddles with answers, as well as some really tricky and fun ones.

Below we have listed the most unusual and fun ones for you. Let’s see are you good enough to take on these mathematics riddles?

1

How do you make the number 7 an even number without addition, subtraction, multiplication, or division?

Drop the "S".

With daily 15-minute personalized games, you can keep your mind fit and increase your intelligence development and focus time

2

It’s confusing but you can find the answer if you think differently.

F I V E

Remove the 2 letters F and E from five and you have IV.

If you are looking for good riddles with answers to freshen up your brain by doing a daily exercise, be sure to check out MentalUP.

3

A grandmother, two mothers, and two daughters went to a baseball game together and bought one ticket each.

How many tickets did they buy in total?

3 tickets (the grandmother is also a mother and the mother is also a daughter)

🧮 👏You’re good at hard math riddles! Let’s continue with MentalUP to see your detailed performance reports:

4

If the tree grew by five centimeters each year, how much higher would the nail be?

The nail would be at the same height since trees grow at their tops.

If you want to more tricky math riddles, MentalUP is for you!

5

How many sides does a circle have?

Two. The inside and the outside.

Well done! Did you like it? Many of riddles and brain teasers waiting for you in MentalUP with Premium features!

6

What does one math book usually say to the other math book?

“Do you want to hear my problems?”

🥳 There will be no more boredom anymore. Try this five star rating math riddles app! ⭐

7

My twin lives at the reverse of my house number. The difference between our house numbers ends in two. What are the lowest possible numbers for our house?

Want to solve more math riddles? Let’s try Award Winning App: MentalUP

8

If you love math riddles with answers here’s a fan favorite for ages 10 and up, yet many people can't seem to get the correct answer.

I have 4 eggs, of course!

Play while you learn with math games and riddles full of fun! 🥰

Solving math puzzles and brain teasers is always fun, no matter your age. Are you ready for a new challenge? Get MentalUP now to get best challenging math riddles with answers!