Question

Find the sum of LCM of 4 and 8 and HCF of 4 and 8
(10 Points)

20

64

12

Answer 1

Answer:

LCM of 4 and 8 is the smallest number among all common multiples of 4 and 8. The first few multiples of 4 and 8 are (4, 8, 12, 16, 20, 24, . . . ) and (8, 16, 24, 32, 40, 48, . . . ) respectively. There are 3 commonly used methods to find LCM of 4 and 8 - by listing multiples, by prime factorization, and by division method.Prime factorization of 4 and 8 is (2 × 2) and (2 × 2 × 2) respectively. As visible, 4 and 8 have common prime factors. Hence, the HCF of 4 and 8 is 2 × 2 =

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