| Answer | Crossword Clue |
|---|---|
| HANOI | Tower of ... (mathematical puzzle) |
| alphametic | a popular mathematical puzzle in which numbers are replaced by letters forming words |
| alphametics | ALPHAMETIC, a popular mathematical puzzle in which numbers are replaced by letters forming words |
| HANOI | Tower of ... (disk-stacking puzzle) |
| PEGS | Tower of Hanoi puzzle threesome |
| HANOI | Tower of ... (classic math puzzle) |
| HANOI | Tower of ... (puzzle with pegs and rings) |
