RRB Group D 27-Sep-2018 Shift 1 Solved Paper

Question : 96 of 100

Marks: +1, -0

Alarms from 3 different clocks sound after every 2,4 and 6 hours, respectively. If the clocks are started at the same time, how many times do the alarms ring together in 3 days?

Validate

Solution:

{LCM}

2,4,6=12

Rings will alarm together once in 12 hours.
Hence in 3 days, rings will alarm 6 times.

12 {\hrs}

\→1

times
3 days

=72 {\hrs}→{72}/{12}=6

times.

Go to Question:

Prev Question

Next Question