Question : Directions: Which number will replace the question mark (?) in the following series? 12, 25, 51, 103, ?, 415, 831
Option 1: 208
Option 2: 207
Option 3: 206
Option 4: 200
Latest: SSC CGL Tier 1 Result 2024 Out | SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL Tier 1 Scorecard 2024 Released | SSC CGL complete guide
Suggested: Month-wise Current Affairs | Upcoming Government Exams
Correct Answer: 207
Solution : Given: 12, 25, 51, 103, ?, 415, 831
Multiply the previous term by 2 and add 1 to the resultant term to get the next term. (12 × 2) + 1 = 25; (25 × 2) + 1 = 51; (51 × 2) + 1 = 103; (103 × 2) + 1 = 207; (207 × 2) + 1 = 415; (415 × 2) + 1 = 831
So, 207 is the missing term in the series. Hence, the second option is correct.
Candidates can download this ebook to know all about SSC CGL.
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Question : Directions: Which number should replace the question mark (?) in the following number series? 49, 54, 44, 59, ?, 64, 34
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 214, 207, 193, ?, 144, 109
Question : Directions: Which number will replace the question mark (?) in the following series? 5, 12, 26, ?, 110, 222
Question : Directions: Which number will replace the question mark (?) in the following series? 10, 15, 25, 45, 85, (?)
Question : Directions: Which number should replace the question mark (?) in the following number series? 32, 54, 98, 186, ?, 714
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile