Can you find a five letter word that is left with only two letters if one is removed?

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

What breaks yet never falls, and what falls yet never breaks?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Replace the question mark with the number below given a simple math problem.

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Spot the cat in the picture below

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

You bought me for dinner but never eat me. What am I?