I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Replace the question mark with the correct number in the below-given picture?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

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?

There was a strange boy who was born before his father. How can this be possible?

How can you leave a room with two legs and return with six legs?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

How many squares, of any size, can you find on this chessboard which do not contain a Rook?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?