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This archived guide is for NYT Strands game #640, published Wednesday, December 3, 2025—not the daily puzzle for October 8, 2026. Start with the theme clue below, then reveal progressively stronger hints only if you need them.
December 3 theme clue
“It all adds up.”
A gentle hint
Think of a place where you might use a calculator.
Spangram hints
The spangram is nine letters long. Its opening letters are MA. For a stronger clue, it connects the board from the bottom at column 1 to the top at column 5.
All NYT Strands answers for December 3
Spoilers below: This is the complete answer list for game #640.
- GRAPH
- THEOREM
- FUNCTION
- EQUATION
- CALCULATION
- Spangram: MATHCLASS
Why these words fit
The five theme words are mathematical terms associated with a math class, which the spangram names. The puzzle’s answer set is confirmed by guides published by TechRadar, Forbes, and Parade.
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How Strands hints work
In Strands, players connect adjacent letters in any direction, including diagonally, to make theme words. Find three valid words that are not part of the theme to unlock a hint revealing the letters of a theme answer. The spangram describes the theme and touches at least two sides of the grid. These mechanics and play locations were described in a December 2025 Forbes guide; current availability may differ. Forbes said the game could be played on the NYT website and in the NYT Games app.
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