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?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Why Wine Glass Stem is so long?

By using 'because' continuously three times, can you make an English statement ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Can you solve the maths in the below-given picture equation?