IndiaBIX.com
Arithmetic Aptitude Data Interpretation
Logical Reasoning Verbal Reasoning Non Verbal Reasoning
General Knowledge
Sudoku Number puzzles Missing letters puzzles Logical puzzles Playing cards puzzles Clock puzzles
C Programming C++ Programming C# Programming Java Programming
Microbiology Biochemistry Biotechnology Biochemical Engineering
Civil Engineering Mechanical Engineering Chemical Engineering Networking Database Questions Computer Science Basic Electronics Digital Electronics Electronic Devices Circuit Simulation Electrical Enigneering Engineering Mechanics Technical Drawing
Placement Papers Group Disucssion HR Interview Technical Interview Body Language
Aptitude Test Verbal Ability Test Verbal Reasoning Test Logical Reasoning Test C Programming Test Java Programming Test Data Interpretation Test General Knowledge Test
Data Structures Operating Systems Networking DATABASE Database Basics SQL Server Basics SQL Server Advanced SQL Server 2008 JAVA Core Java Java Basics Advanced Java UNIX Unix File Management Unix Memory Management Unix Process Managemnt C Interview Questions The C Language Basics .NET Interview Questions .NET Framework ADO.NET ASP.NET Software Testing

Aptitude - Odd Man Out and Series - Discussion

@ : Home > Aptitude > Odd Man Out and Series > Missing No. - Discussion

Read more:

"You cannot shake hands with a clenched fist."
- Indira Gandhi

Insert the missing number.

12. 

15, 31, 63, 127, 255, (....)

[A]. 513[B]. 511
[C]. 517[D]. 523

Answer: Option B

Explanation:

Each number is double the preceding one plus 1.

So, the next number is (255 x 2) + 1 = 511.


Ardyula Dattatreya Sarma said: (Sat, Aug 25, 2012 09:46:19 PM)    
 
Another way to answer it
the difference between number is increased double
15+16=31
31+32=63
63+64=127
127+128=255
255+256=511

Write your comments here:
Name *:     Email:


© 2008-2013 by IndiaBIX™ Technologies. All Rights Reserved | Copyright | Terms of Use & Privacy Policy

Contact us: info@indiabix.com     Follow us on twitter!