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1 2 5 9 = 24: 4 solutions

Difficulty: EasyOpen in Solver

1 + 5 + 2 × 9 = 24

  1. 1 + 5 = 6
  2. 2 × 9 = 18
  3. 6 + 18 = 24

4 solutions

  • 9 + 5 × (1 + 2) = 24Steps
    1. 1 + 2 = 3
    2. 5 × 3 = 15
    3. 9 + 15 = 24
  • (1 − 9) × (2 − 5) = 24Steps
    1. 1 − 9 = -8
    2. 2 − 5 = -3
    3. -8 × -3 = 24
  • (5 − 2) × (9 − 1) = 24Steps
    1. 5 − 2 = 3
    2. 9 − 1 = 8
    3. 3 × 8 = 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 5 9 make 24?

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

How many solutions does 1 2 5 9 have?

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

How difficult is 1 2 5 9?

It is rated “Easy” 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).