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Question 144Asked in Bihar STET Paper 2 Computer Science (Class 11-12), 12 Sep 2023, Shift 2

The sum of two numbers is 156 and their HCF is 13. The numbers of such number pairs is

  1. A2
  2. B5
  3. C4
  4. D3
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Correct answer: (A) 2

Explanation

Let the numbers be 13a and 13b with a + b = 12 and a, b co-prime: (1, 11) and (5, 7) only, so there are 2 pairs.

From Bihar STET Paper 2 Computer Science (Class 11-12) PYQ, 12 Sep 2023, Shift 2

This is question 144 of Bihar STET Paper 2 Computer Science (Class 11-12) PYQ, 12 Sep 2023, Shift 2. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.