What number should come in place of the question mark below?

What does this rebus riddle means ?

Which letter of the alphabet has the most water?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have branches, but no fruit, trunk or leaves. What am I?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

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?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?