Hints for SUM #32

Difficulty: Medium

Spoiler-safe hints for the SUM puzzle of October 19, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (42): start with 1 + 5 = 6

Hint 2

Target 2 (273): start with 100 ÷ 5 = 20

Hint 3

Target 3 (515): start with 1 + 19 = 20

The answer

Contains the answer. Open only if you are stuck.

1 · 5 · 7 · 19 · 100

  • Target 1: 421 + 5 = 6 · 7 × 6 = 42
  • Target 2: 273100 ÷ 5 = 20 · 19 + 20 = 39 · 7 × 39 = 273
  • Target 3: 5151 + 19 = 20 · 7 + 100 = 107 · 5 × 107 = 535 · 535 − 20 = 515

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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.