Hints for SUM #30

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 17, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (31): start with 3 × 10 = 30

Hint 2

Target 2 (162): start with 3 × 5 = 15

Hint 3

Target 3 (653): start with 1 + 12 = 13

The answer

Contains the answer. Open only if you are stuck.

1 · 3 · 5 · 10 · 12

  • Target 1: 313 × 10 = 30 · 1 + 30 = 31
  • Target 2: 1623 × 5 = 15 · 10 × 15 = 150 · 12 + 150 = 162
  • Target 3: 6531 + 12 = 13 · 5 × 10 = 50 · 13 × 50 = 650 · 3 + 650 = 653

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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.