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1 2 7 9 = 24: 2 solutions

Difficulty: MediumOpen in Solver

1 + 9 + 2 × 7 = 24

  1. 1 + 9 = 10
  2. 2 × 7 = 14
  3. 10 + 14 = 24

2 solutions

  • 2 × 9 − (1 − 7) = 24Steps
    1. 2 × 9 = 18
    2. 1 − 7 = -6
    3. 18 − -6 = 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.

Related hands

FAQ

Can 1 2 7 9 make 24?

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

How many solutions does 1 2 7 9 have?

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

How difficult is 1 2 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).