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

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

Can you find out the missing number in the grid?

Replace the question mark with the number below given a simple math problem.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.