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    Question

    Let ‘p’ denote the number of primes from 1 to 30, and

    ‘q’ be the number of prime numbers in the range 31 to 50. What is the product p × q?
    A 90 Correct Answer Incorrect Answer
    B 84 Correct Answer Incorrect Answer
    C 42 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Prime numbers from 1 to 30: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 → Total = p = 10

    Prime numbers from 31 to 50: 31, 37, 41, 43, 47 → Total = q = 5

    p × q = 10 × 5 = 50

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