engineering intelligence MCQ #1607

Complete the series: 1, 3, 7, 15, ?

engineering intelligence MCQ #1607

  1. Question 1

    Q1. Complete the series: 1, 3, 7, 15, ?

    • A) 31
    • B) 33
    • C) 29
    • D) 27

    Answer: 31

    Explanation: The series is formed by subtracting 1 from the next power of 2: 2^1 - 1 = 1, 2² - 1 = 3, 2³ - 1 = 7, 2⁴ - 1 = 15, 2^5 - 1 = 31.