What is the next number in this series?

4,12,84,3612....

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

How many times do a clock's hands overlap in a day ?

There are forty elephants and they have forty-fore heads. How can this be possible?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.