Before Mount Everest was discovered, what was the highest mountain in the world?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

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?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What is the centre of gravity?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?