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    Question

    Find 52 ├Ч 48 without doing full multiplication

    directly.
    A 3325 Correct Answer Incorrect Answer
    B 1060 Correct Answer Incorrect Answer
    C 2496 Correct Answer Incorrect Answer
    D 1785 Correct Answer Incorrect Answer

    Solution

    Note that 52 = 50 + 2, 48 = 50 тИТ 2 Use (a + b)(a тИТ b) = a┬▓ тИТ b┬▓ So 52 ├Ч 48 = (50 + 2)(50 тИТ 2) = 50┬▓ тИТ 2┬▓ = 2500 тИТ 4 = 2496

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