Which is faster, Heat or Cold ? Explain.

The more of this there is, the less you see. What is it?

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

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Can you solve below mathematical equation?

2^1234 - 2^1233

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

what does the below rebus means?

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.

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?