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    Question

    The smallest 3-digit prime number is added to the LCM of

    first three odd prime numbers to obtain a number ‘Y’. Find the unit digit of ‘Y’.
    A 8 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 6 Correct Answer Incorrect Answer
    D 12 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    LCM of first three odd prime numbers = (3 × 5 × 7) = 105 So, ‘Y’ = 105 + 101 = 206 Unit digit of ‘Y’ = 6

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