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

If 21x = 79x, what is the value of x?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

What has no start, end, or centre?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

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?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What do you see in the given picture?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?