Which is heavier: a ton of bricks or a ton of feathers?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.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

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

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

What number comes next in this sequence:
7 8 5 5 3 4 4 _

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?