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Find the highest common factor of 36 and 84.

Correct answer: C. 12

  • A. 4
  • B. 6
  • C. 12
  • D. 18Education

Explanation

The factors common to 36 and 84 include 1, 2, 3, 4, 6 and 12, with 12 being the greatest. Equivalently, 84 = 2 x 36 + 12 and 36 is divisible by 12, so the H.C.F. is 12. The likely wrong choice is 6, which is a common factor but not the highest one.

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