Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Find the next number in the series below

21 32 54 87 131 ?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.

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

Can you replace the question mark with the correct number in the below table sequence?

What has a bottom at the top?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.