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

What's a single-digit number with no value?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

The answer I give is yes, but what I mean is no. What was the question?

Why is a river so rich ?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

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

What is Luis Suarez's (Soccer Player) favorite tea?

What does a man do only once in his lifetime, but women do once a year after they are 29?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?