Find the value of "?" in the ball picture Riddle below:

How can you leave a room with two legs and return with six legs?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Solve below popular number sequence
314 159 265 358 979 323 846 ?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What always comes into a house through the keyhole?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT