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    Question

    What approximate value should come in place of question mark (?) in the following questions? (You need not to calcualte the exact value)

    (23.99)2– (17.99)2+ (1378.98 + 44.99) ÷ ? = 608

    A 6 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 8 Correct Answer Incorrect Answer
    D 3 Correct Answer Incorrect Answer
    E 4 Correct Answer Incorrect Answer

    Solution

    (23.99)2– (17.99)2+ (1378.98 + 44.99) ÷ ? = 608 => (24)2 – (18)2+ (1379 + 45) ÷ ? = 608 => 576 - 324 + 1424 ÷ ? = 608 => 1424 ÷ ? = 356 => ? = 1424/356 => ? = 4

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