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Three machines give signals at intervals of (16), (24), and (40) minutes respectively. If they signal together now, after how many minutes will they signal together again?

Answer and explanation

Correct answer: (240)

Step 1: The next common signal time is the LCM of the intervals. Step 2: (16=2^4), (24=2^3\times3), and (40=2^3\times5), so LCM (=2^4\times3\times5=240). Step 3: For repeated-time questions, use LCM.

Related tags

Real-NumbersLcmTime-IntervalHcf And Lcm Using Prime FactorisationHcf Lcm Using Prime FactorisationReal NumbersMathematicsClass 10 Mcq

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