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. 21)
21.
The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:
Answer: Option
Explanation:
Required length = H.C.F. of 700 cm, 385 cm and 1295 cm = 35 cm.
Discussion:
42 comments Page 2 of 5.
Shivi said:
7 years ago
Thanks @Sindhuroyal.
Prasanth v said:
7 years ago
Thank you @Nareshbora.
Abhishek said:
7 years ago
Thanks all for explaining the answer.
Bunny said:
8 years ago
How to find factors? Someone explain me.
Archit said:
8 years ago
It is very simple.
Just check the options , if any option is not divisible by any length then you can rule out that option.
Suppose 15 =3*5 where 3 is not divisible by 700 so it's not the right option.
Now 25 is not divisible by 385 so it is also ruled out,
Now 35 =7*5 which can be divided by all,
And last 42 (is even will give even multiple) which is also not divisible by 385 and you don't even have to check for the last one.
Just check the options , if any option is not divisible by any length then you can rule out that option.
Suppose 15 =3*5 where 3 is not divisible by 700 so it's not the right option.
Now 25 is not divisible by 385 so it is also ruled out,
Now 35 =7*5 which can be divided by all,
And last 42 (is even will give even multiple) which is also not divisible by 385 and you don't even have to check for the last one.
(3)
Manasbh said:
8 years ago
Thanks a lot.
Vrinda said:
8 years ago
Why should we add not multiply?
NKC said:
8 years ago
In this question, we need a length that can measure all the lenths but the length of the required scale is shortest that can esasily multiples of the given lengths.
Suman said:
8 years ago
Thank you all for the given solution.
Dilbag said:
8 years ago
Superb explanations. Thank you all.
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