Spot what is wrong here in below Picture?

What occurs twice in a week, once in a year but never in a day?

I make two people out of one. What am I?

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

Find out the missing number in the picture attached:

Can you make a fire with just a single stick?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

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

I always drive my customer away.

Who am I?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?