Hints for SUM #38

Difficulty: Medium

Spoiler-safe hints for the SUM puzzle of October 25, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (36): start with 15 − 9 = 6

Hint 2

Target 2 (103): start with 6 + 7 = 13

Hint 3

Target 3 (677): start with 6 + 7 = 13

The answer

Contains the answer. Open only if you are stuck.

6 · 7 · 9 · 15 · 75

  • Target 1: 3615 − 9 = 6 · 6 × 6 = 36
  • Target 2: 1036 + 7 = 13 · 15 + 75 = 90 · 13 + 90 = 103
  • Target 3: 6776 + 7 = 13 · 9 × 75 = 675 · 15 − 13 = 2 · 675 + 2 = 677

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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.