Your mission

Penny the pig keeps her savings in a vault shaped like a giant piggy bank, and it is locked five ways. A quarter is worth 25 cents, a dime is 10, a nickel is 5, and a penny is 1. A pile with MORE coins is not always worth MORE money. Penny likes puzzles, so she never just tells you an amount. Look closely around her shop and work together.

How to crack a lock

  • Pick any lock from the menu at the top. You can solve them in any order.
  • Read every clue before you start. One clue alone is never enough.
  • Use scratch paper. Draw pictures, make lists, and cross things out.
  • Tap the buttons to build your answer. Then press "Try the lock".
  • A lock will not tell you which part is wrong, so be sure before you try.

My badges

Teacher note

Teachers: type the password to see the answer key.