General Studies · Number Series
Select the number from among the given options that can replace the question mark (?) in the following series. 12, 13, 15, 15, 18, 17, 21, ?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
Share:
- 121
- 219✓
- 323
- 417
Correct answer
19
Download Single Question PDF
Save this question and verified answer as a clean study sheet with live clickable link.
👥
Share with Friends & Study Groups
Challenge your peer aspirants on WhatsApp or Telegram to solve this question!
Online Test Series
Start Free Mock Test →Preparing for General Studies?
Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.
Chapter Practice
Practice Number Series MCQs →Want more practice questions on Number Series?
Solve complete topic-wise tests with detailed solutions on GkGet.
Related Practice Questions
Recommended practice questions in General Studies · Number Series