Aptitude - Problems on H.C.F and L.C.M - Discussion
Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 3)
3.
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?
Answer: Option
Explanation:
L.C.M. of 2, 4, 6, 8, 10, 12 is 120.
So, the bells will toll together after every 120 seconds(2 minutes).
| In 30 minutes, they will toll together | 30 | + 1 = 16 times. |
| 2 |
Discussion:
172 comments Page 6 of 18.
Sangeeta said:
1 decade ago
I didn't understand why did we add 1?
Please explain.
Please explain.
Malatha said:
1 decade ago
I also didn't understand why did we add '1'? please tell me.
Aashish said:
1 decade ago
Thanks sundar. Amazing explanation!
Vasu said:
1 decade ago
Thanks to both Sravan and Sundar for your explanation.
Fozia sheikh said:
1 decade ago
Four bells toll after intervals of 8, 9, 12and 15minutes, respectively. If they toll together at 3pm. When will they toll together next?
Ramesh said:
1 decade ago
Awesome sravan!!
Suparna said:
1 decade ago
Why 30 divided by 2 and 1 added?
Divya said:
1 decade ago
Please present answer to fozia sheihk.
Manasa said:
1 decade ago
120seconds is 2 min so divided by 2.
Saj said:
1 decade ago
@Fozia.
I guess the answer should be 9pm, since the LCM of 8, 9, 12, 15 is 360. i.e 360 minutes i.e. after 6 hours.
I guess the answer should be 9pm, since the LCM of 8, 9, 12, 15 is 360. i.e 360 minutes i.e. after 6 hours.
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