What does below rebus means ?

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!!!

Where do fish keep their money?

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

Find the missing number in the sequence below:

Which is Odd One Out and why?

4377

3954

9862

8454

9831

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

2, 3, 5, 9, 17, _ What is the next number in the sequence?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?