arrow
arrow
arrow
What should come in place of the question mark (?) in the given series?42, 57, 72, 87, 102, ?
Question

What should come in place of the question mark (?) in the given series?
42, 57, 72, 87, 102, ?

A.

108

B.

115

C.

117

D.

121

Correct option is C

Series: 42, 57, 72, 87, 102, ?
Logic: Each number increases by 15:
42 + 15 = 57
57 + 15 = 72
72 + 15 = 87
87 + 15 = 102
So,
102 + 15 = 117
Thus, correct option is (b).

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB NTPC’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow