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Question

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

P3L, N5N, L7P, J11R, H13T, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
F17V

Series Completion: P3L, N5N, L7P, J11R, H13T, ?

To find the missing element in the series, we need to identify the pattern for each component: the first letter, the number, and the second letter.

Pattern Analysis

  • First Letter Progression: The sequence of the first letters is P, N, L, J, H. Analyzing their positions in the alphabet (P=16, N=14, L=12, J=10, H=8), we see a consistent decrease of 2 positions.
    • P (16) - 2 = N (14)
    • N (14) - 2 = L (12)
    • L (12) - 2 = J (10)
    • J (10) - 2 = H (8)
    Therefore, the next letter will be H (8) - 2 = 6, which is the letter F.
  • Number Progression: The sequence of numbers is 3, 5, 7, 11, 13. These are consecutive prime numbers.
    • The prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, ...
    The next prime number after 13 is 17.
  • Second Letter Progression: The sequence of the second letters is L, N, P, R, T. Analyzing their positions in the alphabet (L=12, N=14, P=16, R=18, T=20), we observe a consistent increase of 2 positions.
    • L (12) + 2 = N (14)
    • N (14) + 2 = P (16)
    • P (16) + 2 = R (18)
    • R (18) + 2 = T (20)
    Therefore, the next letter will be T (20) + 2 = 22, which is the letter V.

Combining the Patterns

Combining the results from the pattern analysis:

  • First Letter: F
  • Number: 17
  • Second Letter: V

The missing element in the series is F17V.

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Similar Questions

  1. Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
    GBD 14, KFH 17, OJL 20, SNP 23, ?
  2. Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
    KFU-15 IIQ-22 GLM-31 EOI-42 ?
  3. Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?

    HYP 8, LCT 15, PGX 29, TKB 57, XOF 113, ?
  4. Which option will replace the question mark in the below series?
    A25 : Y1 :: L14 : ?
  5. Select the set that can replace the question marks (?) in the following series.

     $\displaystyle \frac{\text{D}}{23} \; \frac{20}{\text{G}} \; \frac{\text{J}}{17} \; \frac{14}{\text{M}} \; \frac{\text{P}}{11} \; \frac{\text{?}}{\text{?}}$

  6. Select the term that can replace the question mark (?) in the following series.

    B3, D10, F17, H24, ?
  7. Select the alphanumeric-cluster that can replace the question mark (?) in the following series.

    B4D, C9I, D16P, ?
  8. Select the alphanumeric-cluster that can replace the question mark (?) in the following series.

    A9B, C49D, E121F, ?
  9. Four letter-pairs have been given, out of which three are alike in some manner and one is different. Select the odd one.
  10. Study the given series carefully and select the option that will come next (in place of the question marks).

    $\frac{\text{C}}{29} \frac{25}{\text{F}} \frac{\text{I}}{21} \frac{17}{\text{L}} \frac{\text{O}}{13} \frac{\text{?}}{\text{?}}$

Important Questions from Letter and Number Based

  1. Select the option in which the numbers are related in the same way as are the numbers of the following set.

    (4, 8, 16)

  2. Select the option that is related to the third number in the same way as the second number is related to the first number.

    23 : 441 : : 28 : ?

  3. Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number.

    12 : 72 ∷ 18 : ? ∷22 : 242
  4. Select the option that is related to the third number in the same way as the second number is related to the first number.

    7 : 56 :: 11 : ?

  5. Select the option in which the numbers are related in the same way as are the numbers of the following set.

    (12, 60, 84)

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