Why is the Hole below a Lock?

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?

What is the word or phrase?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Find the value of "?" in the ball picture Riddle below:

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?

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