In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Who always enjoys poor health?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

During which month do people sleep the least?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?