How many times can you subtract the number 5 from 25?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

What is always in front of you but can’t be seen?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

I am quite hot but become too cold if you remove the first two letters. What am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?