Math Brain Teasers

Math brain teasers are a true challenge. Are you ready to challenge your child's and your thought process, and try and solve a few?

This is the appropriate place to sharpen your thought processes and to take on some math brain teasers.

No, no, no, this is not the time to give up. Try the challenges below. If you don't succeed, it's no big deal. At any time you can visit the answers to brain teasers page and either get assistance or check your answers.

Number sequence

Here you have a grid with 8 squares.



You must place the numbers 1-8 in the squares, without consecutive numbers being placed next to each other in a row, a column or diagonally.

For example the number three cannot be placed next to the numbers two and four.

Answer

Magic square

Here you have a 3 x 3 grid.



You must place the numbers 1-9 in the squares so that in each row, column or diagonal line, the total of the three numbers is 15.

Answer

Family problem

Two fathers and two sons received 3 oranges. Each one of them received a whole orange. How is this possible?

Answer

Total of 15

The total of the top row of the grid is 15. Fill all of the squares with numbers from 1-5, so that the total is always 15 in the row, in the column and in the diagonal line. Do not use a number more than once in each direction, which means that you must use all of the numbers every time.

Answer

Discover the number

What number comes next in this sequence?

1,5,13,25,____

Answer

What is the connection?

In front of you are 3 circles. In each of the circles there are numbers that have a common connection. Discover the connection between the numbers and fill in the missing number.

Answer

Shapes and numbers

The numbers 0-9 have been changed to shapes. Here you have shape exercises. You must discover which number each shape represents.





Answer

Crossing the river

A man wanted to cross the river with a dog, a cat and a mouse. He could only take one at a time in his boat.

Remember:
If he leaves the dog and the cat together, the dog might harm the cat.
If he leaves the cat and the mouse together, the cat might harm the mouse.

That being said, how will the man get the trio safely to the other side of the river making sure that no animal harms another?

Answer

What is the missing number?

Here you have numbers that are arranged in circles. Discover the rule in the number sequence and fill in the missing number.




Answer

The orange thief

A man stole into the king's garden and picked oranges. On his way out he was caught by the King's guard who said to him "If you wish to leave here safely, give me half of the oranges that you picked and half an orange without cutting it." The thief gave the guard what he requested and went on his way.

A second guard caught him and said to him "If you wish to leave here safely, give me half of the oranges that you picked and half an orange without cutting it." The thief gave the guard what he requested and went on his way.

Just as he was about to leave the garden he was caught by a third guard who said to him "If you wish to leave here safely, give me half of the oranges that you picked and half an orange without cutting it." The thief gave the guard what he requested and left the king's garden unharmed but without any oranges.

How many oranges did the thief pick in the king's garden?



Answer

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