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    Question

    Find the digit which will come at the unit place after

    solving the following expression (769 ├Ч 394 ├Ч 942)
    A 7 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    D 3 Correct Answer Incorrect Answer

    Solution

    Unit digit of 769 = 7(4 x 17 + 1) = 1 ├Ч 7 = 1 ├Ч 7 = 7 Unit digit of 394 = 3(4 x 23 + 2) = 1 ├Ч 32 = 1 ├Ч 9 = 9 Unit digit of 942 = 9(4 x 10 + 2) = 1 ├Ч 92 = 1 ├Ч 81 = 1 ├Ч 1 = 1 Unit digit of (7 ├Ч 3 ├Ч 9) = 7 ├Ч 9 ├Ч 1 = 63 or unit digit = 3

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