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.

A bomb exploded in a room full of married couples and no one died. How?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

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

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?