What is the next number in this series?

4,12,84,3612....

How is a fly different from a mosquito?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What seven-letter word has hundreds of letters in it?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

What does this rebus means ?

How many times in a given day, minutes and hour clock comes in a straight line ?