CAT 2017 Slot 1 QA Q34 Progressions & Series

Question 34 of the Quantitative Ability (QA) section, CAT 2017 Slot 1, with CAT's official answer.

Let a1, a2,.......a3n be an arithmetic progression with a1 = 3 and a2 = 7. If a1 + a2 + ......+a3n = 1830, then what is the smallest positive integer m such that m (a1 + a2 + ..... + an) > 1830?
  1. A
    8
  2. B
    9
  3. C
    10
  4. D
    11

Answer: (B) 9 Progressions & Series MCQ

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

Same concept in other years

See every question on AP problems: write terms as a + (n − 1)d and solve.

More Progressions & Series questions from CAT

All 38 Progressions & Series questions asked since 2017.