Puzzle Copyright © Kevin Stone

**Objective / Rules**

- Complete the grid such that every row and column contains every number exactly once.
- The symbols tell you which are numerical neighbours (e.g. 12, 34, 21).
**Rule 1**– if there is**a symbol**the numbers**are neighbours**(and differ by 1).**Rule 2**– if there is**NOT a symbol**the numbers**are NOT neighbours**.

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