My wallet $7 lighter, I walked out of the store that sells used books with a book of math puzzles. I'll give one of the easiest ones from the book, plus a medium-difficult one. Maybe later, a difficult one.
A wooden cube has edges of length 3 meters. Square holes of side one meter, centered in each face, are cut through to the opposite face. The edges of the holes are parallel to the edges of the cube. The entire surface area including the inside is how many square meters?
A box contains 2 pennies, 4 nickels and 6 dimes. Six coins are drawn without replacement, with each coin having an equal probability of being chose. What is the probability that the value of the coins drawn is at least 50 cents?
[For those outside the USA, penny = 1 cent, nickel = 5 cents, dime = 10 cents.]