Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I don't get anymore wetter, no matter how much rain falls on me.

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

What has 88 keys?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

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 ?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?