What does this below rebus puzzle mean?

Can you replace the question mark with the correct number in the below table sequence?

How many triangles are there on the puzzle below?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

You can see three almost identical images below. Can you spot the odd one out from them?

What does a man do only once in his lifetime, but women do once a year after they are 29?

What goes up but never comes down?

What breaks yet never falls, and what falls yet never breaks?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

Prove that twice of ten is the same as twice of eleven.