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Prime Factors, HCF and LCM

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Question 17

Two automated irrigation pumps, Pump P and Pump Q, both start at the same time.

Pump P runs every 20 minutes.

Pump Q runs every 28 minutes.

Both pumps start together at 4:50 pm.

At what time will both pumps next start at the same time?

[3]

Prime Factors, HCF and LCM Questions

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