How can you divide a pizza into 8 equal slices using only 3 straight cuts?
Hint: Think three-dimensionally!
Cut #1: Cut the pizza straight down the middle into two halves
Cut #2: Keeping the two halves in place, cut the pizza straight down the middle at right angles to the first cut (you will be left with 4 equal quarters
Cut #3: Pile the 4 quarters on top of each other and cut through the middle of the pile. You will be left with 8 equal slices.
Today's brain teaser courtesy of Braingle.com.