RRB NTPC · Question 86
Select the pairs whose numbers are related like the given pair: 19 : 361 :: ______ : ______ A. 13 : 169 B. 15 : 235 C. 9 : 27 D. 12 : 154
Show answer & explanation
Answer: (D) A
Explanation
361 = 19². Likewise 169 = 13². (15² = 225, 9² = 81, 12² = 144.)