Why are all black people so quick ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Rearrange the letters in "new door" to make one word.

What goes up but never comes down?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Forwards I am heavy, backward I am not. What am I?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Take away the whole and some still remain. What is it?