Question

    Find the missing term:

    A 42 Correct Answer Incorrect Answer
    B 35 Correct Answer Incorrect Answer
    C 17 Correct Answer Incorrect Answer
    D 52 Correct Answer Incorrect Answer

    Solution

    8 × 2 – 1 = 15 12 × 2 – 1 = 23 18 × 2 – 1 = 35

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