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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. 17 : 10 :: 21 : 12 :: 33 : ?
    A 15 Correct Answer Incorrect Answer
    B 27 Correct Answer Incorrect Answer
    C 23 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    Logic: (1st number + 3) ÷ 2 = 2nd number.   For, 17 : 20 (17 + 3) ÷ 2 20 ÷ 2 = 10. For, 21 : 12 (21 + 3) ÷ 2 24 ÷ 2 = 12   Similarly, for 33 : ? (33 + 3) ÷ 2 36 ÷ 2 = 18   Hence, the correct answer is. (D).

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