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 ?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Be active and find the killer in the picture Riddle below.

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Why is the longest human nose just 11 inches?

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

Why do we preferably have round manhole covers and not square ones?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

what's the probability of getting a king or a queen from a pack of 52 cards?