What does this mathematical rebus means ?

What does the below image rebus riddle means ?

Can you divide the below-given shape into four equal and identical pieces?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Can you make a six-letter word using the letters N, A and B ?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?