CAT 2019 Slot 1 QA Q16 Progressions & Series

Question 16 of the Quantitative Ability (QA) section, CAT 2019 Slot 1, with CAT's official answer.

If a1 + a2 + a3 + ... + an = 3(2n+1 - 2), then a11 equals [TITA]

TITA: type in the answer. There are no options and no negative marking.

Answer: 6144 Progressions & Series TITA

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 nth term = S_n − S_(n−1).

More Progressions & Series questions from CAT

All 38 Progressions & Series questions asked since 2017.