How many times can you subtract the number two from the number fifty?

Look at the picture and find out which square is not linked with any of the other squares.

John was drowned by he was not wet. How?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

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?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Do you know who was buried in John's tomb?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?