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?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What is next number in the pattern below:

131 517 192 123 ?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

If your uncle’s sister is not your aunt, what relation is she to you?

What has many keys but can’t open a single lock?