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    Question

    Find the number of zeros at the end of the following

    expression: 12 × 16 × 25 × 40 × 45
    A 3 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 6 Correct Answer Incorrect Answer
    D 5 Correct Answer Incorrect Answer

    Solution

    Number of zeros will depend on number of twos and number of fives (whichever is less). Since, 12 = 22 × 3 16 = 24 25 = 52 40 = 23 × 5 45 = 32 × 5 = 0 Number of fives in the following expression = 0 + 0 + 2 + 1 + 1 = 4 So, number of zeros = 4

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