In Ravi’s clock shop, 2 clocks were brought for repairing. One clock had the cuckoo coming out every 16 min, while the other one had the cu… — Answer & Discussion

In Ravi’s clock shop, 2 clocks were brought for repairing. One clock had the cuckoo coming out every 16 min, while the other one had the cuckoo coming out every 18 min. Both cuckoos come out at 12:00 noon. When will they both come out together again?

A2:06 pm
B2:08 pm
C2:24 pm
D2:32 pm

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Discussion 1

CCommunity20 May 2019

It is given that One clock has the cuckoo coming out every 16 min, while the other one has the cuckoo coming out every 18 min.LCM of 18 and 16 is 144So after every 144 minutes = 60 × 2 + 24 = 2 hours and 24 minutes both the cuckoo will come out together.They come out at 12:00. So, now they will come out at 2:24 pm.