If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Take away the whole and some still remain. What is it?

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?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What do you see in the image below

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?