What Time Should the last watch show in the below figure?

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

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

What has many teeth, but cannot bite?

Can you move 2 matchsticks to form four equal sized squares.

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

What is at the end of a rainbow?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Which country gets ill every time?

Replace the question mark with the correct number in below Picture: