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      Question

      Three of the following four options are alike in a

      certain way and thus form a group. Which is the option that does NOT belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding /deleting /multiplying etc., to 13 can be performed. Breaking down 13 into and 3 and then performing mathematical operations on 1 and 3 is not allowed) .
      A 4 - 6 - 52 Correct Answer Incorrect Answer
      B 8 - 3 - 73 Correct Answer Incorrect Answer
      C 2 - 5 - 25 Correct Answer Incorrect Answer
      D 10 - 3 - 109 Correct Answer Incorrect Answer

      Solution

      In each option, the sum of the square of the 1st number and the 2nd number is the 3rd number. In option 'A': '4 - 6 - 52' → 4² + 6² = 16 + 36 = 52.   In option 'B', '8 - 3 - 73' → 8² + 3² = 64 + 9 = 73. In option 'C', '2 - 5 - 25'→ 2² + 5² = 4 + 25 = 29 ≠ 25 In option 'D', '10 - 3 – 109' → 10² + 3² = 100 + 9 = 109

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