When can we add 2 to 11 and get 1 as the correct answer?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What word begins and ends with an E, but has only one letter?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

What do you answer even though it never asks you questions?

What time is it when an elephant sits on a fence?

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

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?