A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

What is the next number in the series?

15 29 56 108 208 ?

Can you write down eight eights so that they add up to one thousand?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?