CAT 2021 Slot 1 QA Q18 Progressions & Series

Question 18 of the Quantitative Ability (QA) section, CAT 2021 Slot 1, with CAT's official answer.

The natural numbers are divided into groups as (1), (2, 3, 4), (5, 6, 7, 8, 9), ….. and so on. Then, the sum of the numbers in the 15th group is equal to
  1. A
    6119
  2. B
    7471
  3. C
    4941
  4. D
    6090

Answer: (A) 6119 Progressions & Series MCQ

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