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Railways PYQCBT 1 2016

RRB NTPC · Question 19

Based on the analogy given, find the missing pair from the given options. \(\frac{3}{5}:34\;\_\_\_:\_\_\_\) A. \(\frac{3}{7}\;:54\) B. \(\frac{4}{7}\;:65\) C. \(\frac{3}{{11}}:140\) D. \(\frac{4}{9}\;:87\)

  1. C

  2. A

  3. D

  4. B

Show answer & explanation

Answer: (D) B

Explanation

In 3/5 : 34, the number is the sum of the squares of numerator and denominator: 3² + 5² = 9 + 25 = 34. Testing the options, 4/7 gives 4² + 7² = 16 + 49 = 65, which matches.