Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

What is next number in the pattern below:

131 517 192 123 ?

What does the below mathematical rebus mean?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

They are three errirs in this question. Can you find them?

Who always enjoys poor health?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Look at the picture and find out which square is not linked with any of the other squares.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?