6th Class Mathematics Related to Competitive Exam Question Bank Series

  • question_answer
    7, 13, 27, 53, ?, 213

    A) 106                 

    B)          107

    C) 105                 

    D)          108

    Correct Answer: B

    Solution :

         \[\times \,2\pm 1\].Thus \[53\times 2+1=107\]


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