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Question

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

B3, D10, F17, H24, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
J31

Analyzing the Series Pattern

The given series is B3, D10, F17, H24, ?. We need to find the next term by identifying the pattern in both the letters and the numbers.

Letter Progression

  • The letters in the series are B, D, F, H.
  • These are consecutive letters in the alphabet, skipping one letter each time (B -> skip C -> D -> skip E -> F -> skip G -> H).
  • Alternatively, their positions in the alphabet are 2, 4, 6, 8. This is an arithmetic sequence with a common difference of 2.
  • The next letter's position will be 8 + 2 = 10.
  • The 10th letter of the alphabet is J.

Number Progression

  • The numbers in the series are 3, 10, 17, 24.
  • Calculate the difference between consecutive numbers:
    • 10 - 3 = 7
    • 17 - 10 = 7
    • 24 - 17 = 7
  • This is an arithmetic sequence with a common difference of 7.
  • The next number will be 24 + 7 = 31.

Determining the Next Term

Combining the next letter (J) and the next number (31), the missing term in the series is J31.

Therefore, the term that replaces the question mark is J31.

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

    P3L, N5N, L7P, J11R, H13T, ?
  6. Select the set that can replace the question marks (?) in the following series.

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

  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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