There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What does an Island and the letter T have in common?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

John was piloting a plane behind a car but was never able to overtake it. Why?

How many triangles are there on the puzzle below?

Can you replace the question mark with the correct number?

I add 5 to 9 and get 2. The answer is correct, so what am I?