What is in seasons, seconds, centuries and minutes but not in decades, years or days?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What number do you get when you multiply all of the numbers on a telephone's number pad?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

I have an eye but still cannot see.

Who am I?

What has hands, but can’t clap?