nerdle

Nerdle #1297 Answer

Friday, August 8, 2025

42*6=252
Structure
AB*C=DEF
Type
Mixed-Length Multiplication
Result
252

How the clues would have read

  • Today's equation begins with a two-digit number in the 40s.
  • This puzzle uses multiplication only.
  • The result is a 3-digit even number.

The numbers behind it

  • Divisibility: 42 is divisible by 2, 3, 6, 7, 14, and 21, 6 is divisible by 2 and 3, and 252 is divisible by 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, and 126
  • Digital roots: 42 → 4+2 = 6, 6 → 6, 252 → 2+5+2 = 9
  • Prime factorization: 42 = 2×3×7, 6 = 2×3, 252 = 2²×3²×7

Why the structure matters

This puzzle's shape is AB*C=DEF — a mixed-length multiplication, where each letter stands for one digit. Recognising the shape before the arithmetic is what separates a three-guess solve from a six-guess struggle: once you know the equation is a mixed-length multiplication, most of the search space is gone before you have spent a single guess.

The result, 252, factors as 2²×3²×7 — those factors are exactly the operations that could have produced it.

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