Good Riddles

Question: If 4+5=24 7+2=21 9+6=63 6+7=?

Question: You have two buckets: one with only white marbles and one with only black marbles. The two buckets have the same number of marbles.

How can you rearrange the marbles to maximize your chances of grabbing a white marble from each?

Question: You are running in a 400 meter race and you overtake the last person, what place are you now in?

Question: There once was a horse that won great fame. What do you think was the horses name.

Question: If you have a cake, how many pieces of cake can you form with 3 straight cuts?