What does this below rebus puzzle mean?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

A bomb exploded in a room full of married couples and no one died. How?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

In the picture given below, can you find out which digit will take place of the question mark?

What does this Rebus Picture mean?

If eleven plus two equals one, what does nine plus five equal?