Nerdle #1661 Answer
Friday, August 7, 2026
18+67=85
- Structure
- AB+CD=EF
- Type
- Double-Digit Addition
- Result
- 85
How the clues would have read
- Today's equation begins with a two-digit number in the 10s.
- This puzzle uses addition only.
- The result is a 2-digit odd number.
The numbers behind it
- Divisibility: 18 is divisible by 2, 3, 6, and 9, 67 is prime, and 85 is divisible by 5 and 17
- Digital roots: 18 → 1+8 = 9, 67 → 6+7 = 13 → 4, 85 → 8+5 = 13 → 4
- Prime factorization: 18 = 2×3², 67 = 67, 85 = 5×17
Why the structure matters
This puzzle's shape is AB+CD=EF — a double-digit addition, 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 addition, most of the search space is gone before you have spent a single guess.
The result, 85, factors as 5×17 — those factors are exactly the operations that could have produced it.
Nerdle is made by Nerdle Limited. nerdle.vip is an independent fan site and is not affiliated with or endorsed by them. Puzzle numbers and answers on this page refer to the official game at nerdlegame.com.