Problems On H.C.F And L.C.M MCQ

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• If x:y be the ratio of two whole numbers and z be their HCF, then the LCM of those two number is = ?
  ক

  $$yz$$

  খ

  $$\frac{{xz}}{y}$$

  গ

  $$\frac{{xy}}{z}$$

  ঘ

  $$xyz$$
• Which of the following is a pair of co-primes ?
  ক

  (16, 12)

  খ

  (18, 25)

  গ

  (21, 35)

  ঘ

  (23, 92)
• Which of the following fraction is the largest ?
  ক

  $$\frac{{7}}{{8}}$$

  খ

  $$\frac{{13}}{{16}}$$

  গ

  $$\frac{{31}}{{40}}$$

  ঘ

  $$\frac{{63}}{{80}}$$
• Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:
  ক

  75

  খ

  81

  গ

  85

  ঘ

  89
• The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3 is:
  ক

  3

  খ

  13

  গ

  23

  ঘ

  33