Hints for SUM #17

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 4, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (69): start with 6 × 9 = 54

Hint 2

Target 2 (107): start with 6 + 7 = 13

Hint 3

Target 3 (595): start with 6 × 9 = 54

The answer

Contains the answer. Open only if you are stuck.

6 · 7 · 9 · 10 · 15

  • Target 1: 696 × 9 = 54 · 15 + 54 = 69
  • Target 2: 1076 + 7 = 13 · 9 × 13 = 117 · 117 − 10 = 107
  • Target 3: 5956 × 9 = 54 · 7 + 54 = 61 · 10 × 61 = 610 · 610 − 15 = 595

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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.