Hints for SUM #31

Difficulty: Medium

Spoiler-safe hints for the SUM puzzle of October 18, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (74): start with 8 × 10 = 80

Hint 2

Target 2 (47): start with 6 × 8 = 48

Hint 3

Target 3 (376): start with 6 × 9 = 54

The answer

Contains the answer. Open only if you are stuck.

6 · 8 · 9 · 10 · 17

  • Target 1: 748 × 10 = 80 · 80 − 6 = 74
  • Target 2: 476 × 8 = 48 · 9 + 48 = 57 · 57 − 10 = 47
  • Target 3: 3766 × 9 = 54 · 10 + 54 = 64 · 64 − 17 = 47 · 8 × 47 = 376

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SUM

Five numbers, four operations, three targets. Combine the numbers with + − × ÷ to hit each target exactly. The same puzzle for everyone, in every language.