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1 3 7 9 = 24: 1 solution

Difficulty: MediumOpen in Solver

(1 + 7) ÷ (3 ÷ 9) = 24

  1. 1 + 7 = 8
  2. 3 ÷ 9 = 1/3
  3. 8 ÷ 1/3 = 24

Solving hints

  • Build a factor pair: split the four numbers into two groups and try to make a factor pair of 24 — 3 × 8, 4 × 6, or 12 × 2 — then multiply the two groups.

  • No factor pair divides cleanly? Switch to sums: make two numbers add up to 24, or try shapes like (a ± b) × (c ± d) and (a + b + c) × d.

FAQ

Can 1 3 7 9 make 24?

Yes. Every one of them is listed above with step-by-step working.

How many solutions does 1 3 7 9 have?

1 — the list above is exhaustive, so every mathematically distinct way to combine the numbers is shown.

How difficult is 1 3 7 9?

It is rated “Medium” on our four-tier scale, based on whether whole-number intermediate steps suffice, how many distinct solutions exist, and whether the hand includes a two-digit card (10–13).