I have 2 US coins totaling 55 cents and one is not a nickel. What are they?
One is not a nickel, but the other one is. Another person-Yeah, the other one is a fifty cent peice. No one ever said that they both weren't nickels, after all.
The puzzle is actually stated differently: "You have two US coins totaling 55 cents and ONE OF THEM is not a nickel". The answer is a nickel and a half dollar. The riddle only says that one coin can't be a nickel, not both. Even using obsolete denominations like 20Â¢ pieces or half-dimes, no two US coins add up to 55 cents unless you use a nickel.