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Question

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

D4W, G5T, K9P, ?, S23H, V37E

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
O14L

To solve the given series, D4W, G5T, K9P, ?, S23H, V37E, we need to identify the pattern governing the series. The series consists of terms made up of a letter, a number, and another letter. Let's analyze each component separately:

Letter Analysis

Observe the first letters in each term:

  • The first term is D, which is the 4th letter of the alphabet.
  • The second term is G, which is the 7th letter of the alphabet.
  • The third term is K, which is the 11th letter of the alphabet.

The sequence of these letters is increasing as follows: D (4) → G (7) → K (11).

Notice a pattern in the difference: 7 - 4 = 3, and 11 - 7 = 4.

Assuming this increasing pattern continues, the next difference should be 5.

Therefore, K (11) + 5 = 16th letter, which is O.

Number Analysis

Observe the numbers in each term:

  • The first term has 4.
  • The second term has 5.
  • The third term has 9.

The pattern here seems to involve adding consecutive prime numbers: 4 + 1 = 5, and then 5 + 4 = 9, followed by 9 + 4 = 13.

Hence, the corresponding number for the missing term should be 13.

Second Letter Analysis

Observe the second letters in each term:

  • The first term has W.
  • The second term has T.
  • The third term has P.

The sequence follows: W → T → P, which translates alphabetically to: 23 (W) → 20 (T) → 16 (P).

The difference pattern here is decrementing by 3, i.e., W (23) - 3 = T (20), and T (20) - 4 = P (16).

So, the following decrement should be 1: P (16) - 1 = L (12).

Result

From the above breakdown, the missing term is O13L.

Term PositionComplete Term
1stD4W
2ndG5T
3rdK9P
4th (Missing)O14L
5thS23H
6thV37E

Thus, the correct option to replace the question mark in the series is O14L.

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Similar Questions

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Important Questions from Alpha-numeric series

  1. Consider the following sequence of numbers: 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6 How many odd numbers are followed by the odd number in the above sequence?

  2. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? _sr_tr_srs_r_srst_

  3. Find the missing number in the following series: 43, 172, 86, 344, ?

  4. Select the missing numbers from the given alternatives

  5. How many such pairs of letters are there in the word JOURNEY (in forward direction), each of which has as many letter in the same sequence between them in the word as in the English alphabet?

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