0 votes
0 votes

Direction for questions: Answer the questions based on the following information. A series $S_{1}$ 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 $S_{2}$, the $n$th term defined as the difference between the $(n+1)$ term and the $n^{th}$ term of series $S_{1}$, is an arithmetic progression with a common difference of $30$. 


What is the sum of series $S_{2}$?

  1. $10$ 
  2. $20$ 
  3. $30$ 
  4. $40$

Please log in or register to answer this question.

Related questions

0 votes
0 votes
1 answer
makhdoom ghaya asked Jan 17, 2016
Let $a_{n+1}= 2 a_{n}+1 ({n}=0, 1, 2,\dots)$ and $a_{0}=0$. Then $a_{10}$ nearest to.$1023$$2047$$4095$$8195$