Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Why do people go to bed?

What Adam and Eve do not have but the rest of the people have?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?