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Part ACSIR NET December 2025the-lcm-needs-the-highest-power-of-every-prime-in-all-three

The lcm needs the highest power of every prime in all three

Three periodic events repeat every 24 seconds, 54 seconds, and 56 seconds. If they coincide at 10:20:00, when will they next coincide?

  1. A.10:35:12
  2. B.10:45:20
  3. C.10:45:12✓
  4. D.10:35:20

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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