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?

How many bananas can you eat if your stomach is empty?

Take away the whole and some still remain. What is it?

Can you write down eight eights so that they add up to one thousand?

Find the missing number in the image below.

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

Can you find out the number of the parking space in which the car is parked?

Can you identify if it's a murder or a suicide ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What have one eye but still cannot see?