Hints for SUM #33

Difficulty: Hard

Spoiler-safe hints for the SUM puzzle of October 20, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (21): start with 40 ÷ 8 = 5

Hint 2

Target 2 (98): start with 4 × 16 = 64

Hint 3

Target 3 (658): start with 4 + 6 = 10

The answer

Contains the answer. Open only if you are stuck.

4 · 6 · 8 · 16 · 40

  • Target 1: 2140 ÷ 8 = 5 · 16 + 5 = 21
  • Target 2: 984 × 16 = 64 · 40 − 6 = 34 · 64 + 34 = 98
  • Target 3: 6584 + 6 = 10 · 8 + 10 = 18 · 16 × 40 = 640 · 18 + 640 = 658

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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.