Complete the table series riddle by finding the number that can replace "??".

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

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Move three sticks of the spiral below to form a square.

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

It is always ahead of me yet I can never see it. What is it?

What is the coolest letter in the alphabet?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.