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Prime Factors, HCF and LCM

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Question 2
44%

Two lighthouse beams, A and B, both flash at the same time.

Beam A flashes every 15 minutes.

Beam B flashes every 18 minutes.

Both beams flash together at 9:45 am.

At what time will both beams next flash together?

[3]

Prime Factors, HCF and LCM Questions

  1. GCSE
  2. /Maths
  3. /Prime Factors, HCF and LCM