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Q: What is the value of a two–digit number? A. The sum of the digits is 15. B. The difference of the squares of the digits is 45. C. The difference of their digits is 3.

  • 1
    B and C together are sufficient
  • 2
    Any one pair of A and B, B and C or C and A is sufficient
  • 3
    C and A together are sufficient
  • 4
    A and B together are sufficient
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Answer : 2. "Any one pair of A and B, B and C or C and A is sufficient"
Explanation :

Answer: B) Any one pair of A and B, B and C or C and A is sufficient Explanation: From the given data, Let the two gits of a number be x & y A) x + y = 15   B) x2 - y2 = 45 (x+y) (x - y) = 45   C) x - y = 3 From any 2 of the given 3 statements, we can find that 2 digit number as  2x = 18 => x = 9 => y = 6 Hence, 2 digit number is 96.   Any one pair of A and B, B and C or C and A is sufficient to find.

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