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LCM of 87 and 145 is_______?

Correct answer: B. 435

  • A. 1305
  • B. 435
  • C. 875
  • D. 48

Explanation

Since 87 = 3 x 29 and 145 = 5 x 29, their HCF is 29 and their LCM is 3 x 5 x 29 = 435. Equivalently, 87 x 145 / 29 = 435. The likely distractor is 1305, which is the product 87 x 15 and does not represent the LCM.

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