Hints for SUM #27

Difficulty: Easy

Spoiler-safe hints for the SUM puzzle of October 14, 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 × 7 = 21

Hint 2

Target 2 (43): start with 3 × 10 = 30

Hint 3

Target 3 (278): start with 3 × 6 = 18

The answer

Contains the answer. Open only if you are stuck.

3 · 6 · 7 · 10 · 19

  • Target 1: 313 × 7 = 21 · 10 + 21 = 31
  • Target 2: 433 × 10 = 30 · 6 + 7 = 13 · 30 + 13 = 43
  • Target 3: 2783 × 6 = 18 · 7 + 19 = 26 · 10 × 26 = 260 · 18 + 260 = 278

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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.