A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Why is the Hole below a Lock?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?