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Byju's Answer
Standard X
Mathematics
Common Difference
Calculate LCM...
Question
Calculate LCM of
2
3
,
5
12
,
10
27
and
4
21
using long division method.
A
5
3
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B
10
3
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C
20
3
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D
40
3
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Solution
The correct option is
C
20
3
We have to find the LCM of
2
3
,
5
12
,
10
27
,
4
21
by long division method.
We know that LCM of fractions
=
LCM of numerator
HCF of denominator
Now let us find the LCM of numerator:
2
,
5
,
10
,
4
Thus the LCM of numerator is
2
×
2
×
5
=
20
Now let us find the HCF of denominator:
3
,
12
,
27
,
21
Thus the HCF of denominator is
3
.
Hence,
LCM of fractions
=
LCM of numerator
HCF of denominator
=
20
3
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