It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Which letter of the alphabet has the most water?

What goes through cities and fields, but never moves?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?