CAT 2021 Exam Question Papers Slot 1 | CAT Quants
CAT Quantitative Aptitude | CAT 2021 Question Papers
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All CAT 2021 Quantitative aptitude questions have detailed answer keys and solutions provided by our experts. Watch the videos below to learn the fastest ways to answer the questions:
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
Explanation
Clearly nth group has (2n – 1) numbers and last number in the group is n2
Now, 15th group shall be (197, 198, …., 224, 225)
The sum of the numbers in the group = (29/2) [197 + 225] = 6119
Ans (1)