Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

What can go up a chimney down, but can’t go down a chimney up?

What does this Rebus Picture means ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

If 21x = 79x, what is the value of x?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?