What has 13 hearts but no other organs?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What does this rebus means ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

If 21x = 79x, what is the value of x?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

Can you solve below mathematical equation?

2^1234 - 2^1233