Hints for SUM #22

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 9, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (14): start with 4 + 16 = 20

Hint 2

Target 2 (236): start with 6 + 9 = 15

Hint 3

Target 3 (556): start with 9 × 12 = 108

The answer

Contains the answer. Open only if you are stuck.

4 · 6 · 9 · 12 · 16

  • Target 1: 144 + 16 = 20 · 20 − 6 = 14
  • Target 2: 2366 + 9 = 15 · 16 × 15 = 240 · 240 − 4 = 236
  • Target 3: 5569 × 12 = 108 · 108 − 16 = 92 · 6 × 92 = 552 · 4 + 552 = 556

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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.