| I | N | T | E | R | I | O | R | |
| + | O | B | S | E | R | V | E | R |
| U | N | I | V | E | R | S | E |
See more puzzles containing INTERIOR, OBSERVER or UNIVERSE.
Would you like to see the solution?
The rules for cryptarithm puzzles are simple. Each letter represents one of the digits 0 to 9. Different letters represent different digits. The first digit in a number can't be 0. Your job is to find out what digit each letter represents. Can you solve the puzzle shown here?