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      Question

      Select the option that is related to the fifth number

      in the same way as the second number is related to the first number and the fourth number is related to the third number. 121 : 169 :: 289 : 361 :: 441 : ?
      A 529 Correct Answer Incorrect Answer
      B 625 Correct Answer Incorrect Answer
      C 576 Correct Answer Incorrect Answer
      D 484 Correct Answer Incorrect Answer

      Solution

      Each pair consists of two perfect squares where the second base is the 2nd succeeding integer (adding 2) to the first base. (121 : 169) → 11² = 121, 11 + 2 = 13 → 13² = 169. (289 : 361) → 17² = 289, 17 + 2 = 19 → 19² = 361. (441 : ?) → 21² = 441, 21 + 2 = 23 → 23² = 529.

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