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Question

The prime factorisation of a and b are
a=22×3×5 and b=2×32.
What is the LCM of a and b?
  1. 180

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Solution

The correct option is A 180
Given
a=22×3×5
b=2×32
The product of all the factors with highest powers is the least common multiple of the numbers.

LCM(a,b) =22×32×5=4×9×5=180

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