NS-001

Find the next number: 1, 2, 3, 5, 8, ?

Rule: This follows a Fibonacci-like rule: each term is the sum of the previous two.

So the next number is 13.

• Picking the first pattern you see without checking it against all rows/columns.
• Ignoring the simplest rule (counts, rotations, alternations) and jumping to a complex story.
• Not testing your rule on the middle row/column (where many puzzles “break” bad rules).