When can we add 2 to 11 and get 1 as the correct answer?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

How many times can you subtract the number 5 from 25?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Be active and find the killer in the picture Riddle below.

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?