Hints for SUM #26

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 13, 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 2 × 12 = 24

Hint 2

Target 2 (117): start with 7 × 30 = 210

Hint 3

Target 3 (616): start with 12 ÷ 4 = 3

The answer

Contains the answer. Open only if you are stuck.

2 · 4 · 7 · 12 · 30

  • Target 1: 312 × 12 = 24 · 7 + 24 = 31
  • Target 2: 1177 × 30 = 210 · 210 ÷ 2 = 105 · 12 + 105 = 117
  • Target 3: 61612 ÷ 4 = 3 · 30 × 3 = 90 · 90 − 2 = 88 · 7 × 88 = 616

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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.