| Puzzle | Core Skill | Difficulty Curve | | :--- | :--- | :--- | | | Logic Deduction | Gentle then steep | | KenKen | Arithmetic + Logic | Moderate | | Crossmath | Equation Solving | Linear | | Meximath | Pattern Recognition + Place Value | Low floor, High ceiling |

If you have recently scrolled through TikTok, Instagram Reels, or YouTube Shorts, you have likely encountered a flurry of comments filled with numbers like “11,” “18,” or “36” under a seemingly simple grid of digits. The puzzle appears elementary at first glance, but the frustration—and the fun—lies in its hidden complexity.

The solution requires you to move like a chess rook (horizontal and vertical), reading all possible two-digit numbers that appear in straight lines (horizontally and vertically).

The challenge reads: "Add all the combinations."