All Exams Test series for 1 year @ ₹349 only
Question

Select the alphanumeric-cluster from among the given options that can replace the question mark (?) in the following series.
k11, m13, q17, s19, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
w23

The question presents a series of alphanumeric clusters: k11, m13, q17, s19, ?. We need to identify the pattern to find the missing cluster.

Pattern Analysis: Letters

Let's examine the letters and their positions in the alphabet:

  • k is the 11th letter.
  • m is the 13th letter.
  • q is the 17th letter.
  • s is the 19th letter.

Now, let's find the difference between the positions of consecutive letters:

  • Position(m) - Position(k) = 13 - 11 = 2
  • Position(q) - Position(m) = 17 - 13 = 4
  • Position(s) - Position(q) = 19 - 17 = 2

The pattern for the letter positions is +2, +4, +2. Following this pattern, the next step is +4.

Next letter position = Position(s) + 4 = 19 + 4 = 23.

The 23rd letter of the alphabet is 'w'.

Pattern Analysis: Numbers

Let's examine the numbers in the series:

  • 11
  • 13
  • 17
  • 19

Find the difference between consecutive numbers:

  • 13 - 11 = 2
  • 17 - 13 = 4
  • 19 - 17 = 2

The pattern for the numbers is +2, +4, +2. The next step is +4.

Next number = 19 + 4 = 23.

Resulting Cluster

Combining the next letter ('w') and the next number (23), the missing alphanumeric cluster is w23.

This corresponds to Option 4.

Was this answer helpful?

Similar Questions

  1. Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
    BD 99 GI 97 LN 93 QS 87 ?
  2. Select the alphanumeric-cluster from among the given options that can replace the question mark (?) in the given series.
    G7H, I9J, K11L, ?
  3. Select the option that can replace the question mark (?) in the following series.
    D3K, E5J, F7I, G11H, ?
  4. A series is given with one term missing. Select the correct alternative from the given options that will complete the series. 

    EF27, GI34, IL41, KO48, ?

  5. Select the number from the given options that can replace the (?) in the following alphanumeric series.

    Q, 18, S, 16, U, 13, W, ?
  6. Select the alphanumeric term that can replace the question mark (?) in the following series. 

    Z63C, X31F, V15I, T7L, R3O, ?

  7. Select the alphanumeric-cluster that can replace the question mark (?) in the following series.

    D4U, G9R, J16O, ?
  8. Select the term that can replace the (?) in the following alphanumeric series. 

    1Z, 3X, 5V, ?

  9. Select the option that can replace the question mark (?) in the following series. 

    A3A, Y8E, ? , O33M, G53Q

  10. Select the term from among the given options that can replace the question mark (?) in the following series.

    2A, 3C, 5F, 7J, 11O, ?

Important Questions from Alpha-numeric series

  1. What should come in place of the question mark (?) in the given series based on the English alphabetical order?
    DFA, HJE, LNI, PRM, ?

  2. What should come in place of the question mark (?) in the given series based on the English alphabetical order?
    GEB, JHE, MKH, PNK, ?

  3. Which letter-cluster will replace the question mark (?) to complete the given series?
    KLHO, LKIN, ?, QFNI, UBRE

  4. Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
    ZY_WZTX_Z_XU_JXT

  5. What should come in place of the question mark (?) in the given series based on the English alphabetical order?

    EGC, IFG, MEK, QDO, ?

Need Expert Advice?
Upcoming Exams
RRB ALP
July 28, 2026
RRB Group D
August 03, 2026
Test Series
RRB NTPC img
Railways
RRB NTPC Under Graduate 2026 New Mock Test Series
1459 Tests 2 Tests Free
215 Attempts
4.3(512)
English, Hindi, Telugu +7 More

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App