People put me on the table and cut me but do not eat me. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

No matter how little or how much you use me, you change me every month. What am I?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Which letter of the alphabet has the most water?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

What has lots of eyes, but can’t see?

Which point will the car reach to go out?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain