What does this Rebus Picture mean?

Can you find out the remainder when 3^300 is divided by 5?

How can you leave a room with two legs and return with six legs?

Replace the question mark with the correct number below.

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

What does it mean?

What is the last thing you take off before bed?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?