LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
32 views
in Mathematics by (24.2k points)
closed by

Choose the correct alternative from the given ones that will complete the series:‐

5, 11, 21, 43, 85, ?


1. 185
2. 170
3. 171
4. 181

1 Answer

0 votes
by (24.2k points)
selected by
 
Best answer
Correct Answer - Option 3 : 171

5

5 × 2 + 1 = 11

11 × 2 - 1 = 21

21 × 2 + 1 = 43

43 × 2 - 1 = 85

85 × 2 + 1 = 171

∴ 171 is the correct answer

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...