What is the next number in this series?

4,12,84,3612....

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

What does this rebus means ?

PROG WORKRESS

When 99 is considered higher than 100?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

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

I am quite hot but become too cold if you remove the first two letters. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who 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?

What occurs twice in a week, once in a year but never in a day?