What is the centre of gravity?

Find the next number in the sequence

5 12 24 36 ?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

Can you replace the question mark with the correct number?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

What does this Rebus Picture means ?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Can you count the number of quadrilaterals in the picture below?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?