Question 20

Find the LCM of 34, 85 and 102.

Solution

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

Calculating the prime factors of the given numbers

34 - 2 x 17

85 - 5 x 17

102 - 2 x 3 x 17

LCM = 2 x 3 x 5 x 17 = 510

Hence, option C is the correct answer.

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