Prove that twice of ten is the same as twice of eleven.

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

Who are the happiest people in IPL match?

Why are all black people so quick ?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

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

No matter how little or how much you use me, you change me every month. What am I?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

In the image given, you can find several triangles. Can you count them all?

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?