How many times can you subtract the number two from the number fifty?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Name a key which is hardest to turn.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

I look at you, you look at me I raise my right, you raise your left. What am I?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?