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. 17)
17.
What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
Answer: Option
Explanation:
L.C.M. of 12, 18, 21 30 2 | 12 - 18 - 21 - 30
----------------------------= 2 x 3 x 2 x 3 x 7 x 5 = 1260. 3 | 6 - 9 - 21 - 15
----------------------------Required number = (1260 รท 2) | 2 - 3 - 7 - 5
= 630.Discussion:
30 comments Page 3 of 3.
Supu said:
4 years ago
Yes right @Vradhi.
Please someone explain it.
Please someone explain it.
Abhi said:
2 years ago
21x30 = 630.
So, the Answer is 630.
So, the Answer is 630.
(2)
Priz said:
1 decade ago
Thanks Aparna, it is really helpful
Govind said:
8 years ago
Thanks for the given explanation.
CHINMAYEE said:
7 years ago
If triple then 3 is diveded.
Braj said:
6 years ago
The correct answer is 1260.
Tinku said:
8 years ago
Thanks for the explanation.
Ritesh said:
9 years ago
Why divided by 2, in L.C.F?
Preksha Darshan said:
6 years ago
630 is the right answer.
Grishma said:
1 decade ago
How 1260/2 comes?
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