Hints for SUM #8

Difficulty: Medium

Spoiler-safe hints for the SUM puzzle of September 25, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (40): start with 5 × 16 = 80

Hint 2

Target 2 (104): start with 3 + 10 = 13

Hint 3

Target 3 (267): start with 2 × 10 = 20

The answer

Contains the answer. Open only if you are stuck.

2 · 3 · 5 · 10 · 16

  • Target 1: 405 × 16 = 80 · 80 ÷ 2 = 40
  • Target 2: 1043 + 10 = 13 · 16 ÷ 2 = 8 · 13 × 8 = 104
  • Target 3: 2672 × 10 = 20 · 20 − 3 = 17 · 16 × 17 = 272 · 272 − 5 = 267

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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.