I shave every day, but my beard stays the same. What am I?

Can you solve the maths in the below-given picture equation?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What can jump higher than a building?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

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

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.