4 Views

Question :

Directions: Which number will replace the question mark (?) in the following series?
729, 243, ?, 27, 9, 3

Option 1: 54

Option 2: 78

Option 3: 81

Option 4: 36


Team Careers360 21st Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 81


Solution : Given:
729, 243, ?, 27, 9, 3

The power of 3 is decreased by 1 in each number, to get the required missing number –
729 = 3 6 ; 243 = 3 5 ; 81 = 3 4 ; 27 = 3 3 ; 9 = 3 2 ; 3 = 3 1

So, 81 is the missing number in the series. Hence, the third option is correct.

SSC CGL Complete Guide

Candidates can download this ebook to know all about SSC CGL.

Download EBook

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books