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CAT 1996 — QA Question 36

Arithmetic ProgressionEasy
Passage / Data

Answer the questions based on the following information.

A series S1 of five positive integers is such that the third term is half the first term and the fifth term is 20 more than the first term. In series S2, the nth term defined as the difference between the (n + 1)th term and the nth term of series S1, is an arithmetic progression with a common difference of 30.

What is the sum of series S2?

Answer & solution

  • A

    10

  • 20

  • C

    30

  • D

    40

Solution

Consider the solution to first question of this set.

Sum of S2 = (-40) + (-10) + 20 + 50 = 20.

Hence, option (b).

CAT 1996 QA Q36: What is the sum of series S 2 ? — Solution | TheCATExam