Where do you go to learn how to make ice cream?

What does the below mathematical rebus mean?

If two's company, and three's a crowd, then whats four and five ?

What is more useful when it is broken?

Prove that the below maths equation is true.

8 + 8 = 91

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

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

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.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.