If eleven plus two equals one, what does nine plus five equal?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Which is the correct shadow of the bird?

Solve the following series:
AZ, GT, MN, __, YB

What two things can you never eat for breakfast?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

How many letters are in the alphabet?