Multiple choice

The L.C.M and H.C.F of two numbers are 84 and 21, respectively. If the ratio of two numbers is 1 : 4, which of the following is the greater of the two numbers?

  1. 21

  2. 168

  3. 84

  4. 48

  5. 88
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let the one number be x so according to ratio other number will be 4x. Product of two numbers = H.C.F * L.C.Mx * 4x = 84 * 214x2 = 1764x2 = 441x = 214x = 4 * 21 = 84.Thus, the greater number is 84. It is the correct answer.

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