If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

You can hear me, but you can't touch or see me.

What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

Spot what is wrong here in below Picture?

What is red and smells like blue paint?

Find the last number in the series below:

voN luJ yaM raM ---

What is the centre of gravity?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?