81 x 9 = 801. What must you do to make the this equation true?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

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?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?