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Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ritu Jangid posted an Question
December 26, 2020 • 19:56 pm
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30 points
30 points
- CSIR NET
- Life Sciences
Example (18 six bells ring at intervals of 2, 4, 6, 8, 10 and 12 sec, respectively. they started ringing simultaneously. how many times will they ring together
Example (18 Six bells ring at intervals of 2, 4, 6, 8, 10 and 12 sec, respectively. They started ringing simultaneously. How many times will they ring together in 30 min? Solution : LCM of 2, 4, 6, 8, 10 and 12 = 120 . Bells will ring together after every 120 sec or 2 min. Since bells rings together after every 2 min so in 30 min it will ring as (30 min/2 min)= 15 times but at starting (0 sec it also rings so total 16 times.)
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Deepak singh 1
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after each 120sec or 2 minute . So in 30 min - 15+1 = 16 times .. which is answer . its simple , whats your doubt in this ?
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Ritu jangid
Okay Sir.. I will continue practice these types of questions to improve my grip