The LCM of 9 and 21 is the product of all prime numbers on the left, i.e. LCM(9, 21) by division method = 3 × 3 × 7 = 63 .
Answer: LCM of 7, 14, and 21 is 42 .
∴LCM(7, 11, 21, 22) = 462 .
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The LCM of 7 and 9 is 63 . To find the least common multiple (LCM) of 7 and 9, we need to find the multiples of 7 and 9 (multiples of 7 = 7, 14, 21, 28 . . . .
The LCM of 7 and 22 is 154 .
Answer: LCM of 7 and 7 is 7 .
HCF of 14 and 21 by Prime Factorization
As visible, 14 and 21 have only one common prime factor i.e. 7 . Hence, the HCF of 14 and 21 is 7.
Answer: GCF of 13 and 31 is 1 .
The least common multiple of 27, 23 and 15 is 3105 .
Answer: LCM of 10 and 15 is 30 .
The LCM of 18 and 27 is 54 . To find the least common multiple of 18 and 27, we need to find the multiples of 18 and 27 (multiples of 18 = 18, 36, 54, 72; multiples of 27 = 27, 54, 81, 108) and choose the smallest multiple that is exactly divisible by 18 and 27, i.e., 54.
Answer: LCM of 7 and 13 is 91 .
Answer: LCM of 5, 7, and 9 is 315 .
What is the LCM of 6, 7, and 9? Answer: LCM of 6, 7, and 9 is 126 .
Answer: GCF of 7 and 9 is 1 .
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