Nerdle #1135 Answer
Thursday, February 27, 2025
87−44=43
- Structure
- AB-CD=EF
- Type
- Double-Digit Subtraction
- Result
- 43
How the clues would have read
- Today's equation begins with a two-digit number in the 80s.
- This puzzle uses subtraction only.
- The result is a 2-digit odd number.
The numbers behind it
- Divisibility: 87 is divisible by 3 and 29, 44 is divisible by 2, 4, 11, and 22, and 43 is prime
- Digital roots: 87 → 8+7 = 15 → 6, 44 → 4+4 = 8, 43 → 4+3 = 7
- Prime factorization: 87 = 3×29, 44 = 2²×11, 43 = 43
Why the structure matters
This puzzle's shape is AB-CD=EF — a double-digit subtraction, 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 double-digit subtraction, most of the search space is gone before you have spent a single guess.
The result, 43, is prime — so it cannot be reached by multiplying two smaller whole numbers, which rules out a whole family of candidate equations immediately.
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