hamburger menu
All Coursesall course arrow
adda247
reward-icon
adda247
    arrow
    arrow
    arrow
    Which of the following numbers will replace the question mark (?) in the given series?5 , 24 , 61 , 122 , 213 , ?
    Question

    Which of the following numbers will replace the question mark (?) in the given series?

    5 , 24 , 61 , 122 , 213 , ?

    A.

    340 

    B.

    350

    C.

    320

    D.

    334

    Correct option is A

    Given:  5 , 24 , 61 , 122 , 213 , ?
    Logic: Take the cube of the numbers starting from 2, 3, 4, 5, 6, 7 and then subtract 3 by it.
    23= 8, 8 - 3 = 5 (1st term)
    33= 27, 27 - 3 = 24 (2nd term)
    43= 64, 64 - 3 = 61 (3rd term)
    53= 125, 125 - 3 = 122 (4th term)
    63= 216, 216 - 3 = 213 (5th term)
    73= 343, 343 - 3 = 340 (6th term)
    So, the next number in the series is 340
    Thus, the correct answer is (a).

    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 UG Level PYP (Held on 7 Aug 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 Group D’ Mock Tests with

    • 60000+ Mocks and Previous Year Papers
    • Unlimited Re-Attempts
    • Personalised Report Card
    • 500% Refund on Final Selection
    • Largest Community
    students-icon
    382k+ students have already unlocked exclusive benefits with Test Prime!
    Our Plans
    Monthsup-arrow