Complete the table series riddle by finding the number that can replace "??".

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

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

Can you find the missing piece of the Porsche?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Find the 8 in the below-given Image.

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111