7, 23, 58, 127, 269, 555 263 261 299 286 The order of above series is given as F

CuriousTab

C Programming C# Programming C++ Programming Database Java Programming Networking

Biochemical Engineering Biochemistry Biotechnology Chemical Engineering Civil Engineering Computer Science Digital Electronics Electrical Engineering Electronics Electronics and Communication Engineering Mechanical Engineering Microbiology Technical Drawing

Current Affairs General Knowledge

Data Interpretation Logical Reasoning Non Verbal Reasoning Verbal Ability Verbal Reasoning

AIEEE Bank Exams CAT GATE IIT JEE TOEFL

Analyst Bank Clerk Bank PO Database Administrator IT Trainer Network Engineer Project Manager Software Architect

Discussion

Home ‣ Verbal Reasoning ‣ Number Series See What Others Are Saying!

Question
7, 23, 58, 127, 269, 555
Options
A. 263
B. 261
C. 299
D. 286

Correct Answer

261

Explanation

The order of above series is given as
First term = 7
Second term = ( First term x 2 ) +9
? Second term = ( 7 x 2 ) + 9 = 14 + 9 = 23
Third term = ( Second term x 2 ) +11
? Third term = ( 23 x 2 ) + 11 = 46 + 11 = 58 is wrong , 57 should be Third term because ( 23 � 2 ) + 11 = 57 .
Similarly we can find all others terms also.
Fourth term = ( Third term x 2 ) +13
? Fourth term = ( 57 x 2 ) +13
Fifth term = ( Fourth term x 2 ) +15
? Fifth term = ( 127 � 2 ) + 15 = 269
Sixth term = ( Fifth term x 2 ) +17
? Sixth term = ( 269 � 2 ) + 17 = 555