Two more
#1 This one is fun.
You have three crates of fruit: Apples, Oranges and Apples+Oranges.
You know all three crates are mislabeled.
How many pieces of fruit do you need to pull out to determine what fruit is in which crate?
#2
Arrange the numbers 1-9 on a tic-tac-toe board so that all columns, rows and both diagonals add up to the same number.
