Question

    What value should come in place of question mark (?) in

    the following question. (You need not to calcualte the exact value) (36.004 + 34.997)2 - (36.004 - 34.997)2 = ? × 36.004 × 34.997
    A 4 Correct Answer Incorrect Answer
    B 14 Correct Answer Incorrect Answer
    C 24 Correct Answer Incorrect Answer
    D 34 Correct Answer Incorrect Answer
    E 28 Correct Answer Incorrect Answer

    Solution

    (36.004 + 34.997)2 - (36.004 - 34.997)2 = ? × 36.004 × 34.997   (36+35)2 - (36 - 35)2 = ? × 36 × 35    712 - 12 = ? × 36 × 35    (71+1)(71-1) = ? × 36× 35   72 × 70 = ? × 36× 35   ? = 72 × 70/(36×35) = 4

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