What is the next number in this series?

4,12,84,3612....

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Why do people go to bed?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Solve this riddle by finding the odd one out from the rest.

What will you call your mother's brother's brother-in-law?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?