I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

Move three sticks of the spiral below to form a square.

What number divided by 4 is the same as that number minus 4?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

How many bananas can you eat if your stomach is empty?

What does this mathematical rebus means ?

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?