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

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

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

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

When is the top of a mountain similar to a savings account?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Which letter of the alphabet has the most water?