The number of pairs of positive integers whose sum is 99 and HCF is 9 is = ?
  • 15
  • 22
  • 33
  • 44
Answer:- 1
Explanation:-

Solution:
According to question
HCF = 9
⇒ Then the two number will be 9a, 9b
⇒ 9a + 9b = 99
⇒ a + b = 11
⇒ Pairs of positive integer (1, 10) (2, 9) (3, 8) (4, 7) (5, 6) = 5

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