Question: There are these polar bears. And one day they decide to go fishing. So they go out on the ice, they cut a hole, and they sit around it. They catch 2 Karp and 7 Blue Gill. They say, that was some good fishing. Let's roll the dice. They role a 4 and a 3. How many polar bears were there?
Answer: Look at a die. If the "polar bears" cut a hole in the ice, it would be in the center. Every mark around the center represents a polar bear. So if they roll a 4 and a 3, there are six total marks around the center. A mark in the center does not count.
Question: A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck.
Answer: Nothing, after traveling 80 miles the truck will have surely burnt enough fuel to allow the bird to land on the truck without breaking the bridge.