Question 69

The LCM of the three numbers 45, 30 and 35 is:

Solution

The prime factors for the given numbers is:

45 - 3$$^{2}$$ x 5

30 - 2 x 3 x 5

35 - 5 x 7

LCM of three numbers can be obtained by multiplying each factor with the greatest number of times it occurs.

LCM = 2 x 3$$^{2}$$ x 5 x 7 = 630

Hence, option A is the correct answer.

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