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  3. 8th Class
  4. Mathematics
  5. Related to Competitive Exam

8th Class Mathematics Related to Competitive Exam Question Bank Series

  • question_answer
    1, 3, 6, 10, 15, ?, 28

    A) 20                               

    B) 21

    C) 22                               

    D) 24

    Correct Answer: B

    Solution :

    Triangular numbers, differences increase by 1.


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