Hints for SUM #35

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 22, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (32): start with 9 − 7 = 2

Hint 2

Target 2 (209): start with 7 × 30 = 210

Hint 3

Target 3 (697): start with 7 × 10 = 70

The answer

Contains the answer. Open only if you are stuck.

3 · 7 · 9 · 10 · 30

  • Target 1: 329 − 7 = 2 · 30 + 2 = 32
  • Target 2: 2097 × 30 = 210 · 9 + 210 = 219 · 219 − 10 = 209
  • Target 3: 6977 × 10 = 70 · 30 × 70 = 2100 · 2100 − 9 = 2091 · 2091 ÷ 3 = 697

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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.