find the LCM of the following numbers by prime fractionation method 21 and 35
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Answered by
0
Answer:
105
Step-by-step explanation:
we write the prime factors of each number first,
21 = 3 × 7
35 = 5 × 7
LCM = 3 × 5 × 7
LCM = 105
7 appears as a common prime factor of both numbers, so it appears in the LCM once, whereas 3 and 5 are not common prime factors so they both appear in final LCM calculation.
Answered by
3
Step-by-step explanation:
21 =3×7
35 =5×7
HCF = 7
LCM = 7×7×5×3
= 49× 15
=735
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