Question

4 84 = 2 x 3 x 7 and 90 = 2 x 32 x 5
a Write the HCF of 84 and 90 as a product of primes.
b Write the LCM of 84 and 90 as a product of primes.

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Answer 1

Answer:

a) the HCF of 84&90

84=2×2×3×7

90=2×3×3×5

common are :2×3=6

b) the LCM of 84 &90

2×2×3×3×5×7=1260

Step-by-step explanation:

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