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    Question

    Which number will replace the question mark in the

    following sequence? 3, 6, 9, 18, 21, ?
    A 42 Correct Answer Incorrect Answer
    B 32 Correct Answer Incorrect Answer
    C 33 Correct Answer Incorrect Answer
    D 36 Correct Answer Incorrect Answer

    Solution

    The pattern alternates between multiplying by 2 and adding 3: • 3 × 2 = 6 • 6 + 3 = 9 • 9 × 2 = 18 • 18 + 3 = 21 • 21 × 2 = 42 Hence, the next number is 42.

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