The centre of the third figure is empty. What digit should fit inside?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Solve this riddle by finding the odd one out from the rest.

Complete the table series riddle by finding the number that can replace "??".

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

A father's child, a mother's child, yet no one's son.

Who am I?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.