Hints for SUM #7

Difficulty: Easy

Spoiler-safe hints for the SUM puzzle of September 24, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

Target 1 (48): start with 4 × 13 = 52

Hint 2

Target 2 (157): start with 4 × 13 = 52

Hint 3

Target 3 (137): start with 4 × 7 = 28

The answer

Contains the answer. Open only if you are stuck.

4 · 5 · 7 · 13 · 100

  • Target 1: 484 × 13 = 52 · 100 − 52 = 48
  • Target 2: 1574 × 13 = 52 · 5 + 100 = 105 · 52 + 105 = 157
  • Target 3: 1374 × 7 = 28 · 5 × 13 = 65 · 100 − 28 = 72 · 65 + 72 = 137

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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.