arrow
arrow
arrow
Which of the following numbers will replace the question mark (?) in the given series?4, 9, 19, 39, 79, ?​​
Question

Which of the following numbers will replace the question mark (?) in the given series?
4, 9, 19, 39, 79, ?​​

A.

152

B.

153

C.

151

D.

159

Correct option is D

​Given:
4, 9, 19, 39, 79, ?
Logic: adding a number that doubles each time: 5, 10, 20, 40, 80,....
4 + 5 = 9
9 + 10 = 19
19 + 20 = 39
39 + 40 = 79
Similarly;
79 + 80 = 159
Thus, correct option is (d).
​​​

Free Tests

Free
Must Attempt

SSC CGL T-I Similar Paper (Held on 12 Sep 2025 S2)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon200 Marks
  • timerIcon60 Mins
languageIcon English
Free
Must Attempt

SSC CGL T-I GA Section Test 01

languageIcon English
  • pdpQsnIcon25 Questions
  • pdpsheetsIcon50 Marks
  • timerIcon15 Mins
languageIcon English
Free
Must Attempt

SSC CGL T-I Full Mock Test 1 (Exam Level)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon200 Marks
  • timerIcon60 Mins
languageIcon English
test-prime-package

Access ‘SSC Stenographer’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
383k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow