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Question

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

B9U, E16R, H25O, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
K36L

Alphanumeric Series Logic Explained

The series consists of alphanumeric clusters: B9U, E16R, H25O. We need to find the next cluster by identifying the pattern in the first letter, the number, and the second letter separately.

Identifying the Pattern

  • First Letter Progression:
    • B (2nd letter)
    • E (5th letter)
    • H (8th letter)
    The pattern is adding 3 to the position of the previous letter (2 + 3 = 5, 5 + 3 = 8). The next letter will be the (8 + 3) = 11th letter, which is K.
  • Number Progression:
    • 9 = $3^2$
    • 16 = $4^2$
    • 25 = $5^2$
    The numbers are consecutive squares starting from 3. The next number will be $6^2$, which is 36.
  • Second Letter Progression:
    • U (21st letter)
    • R (18th letter)
    • O (15th letter)
    The pattern is subtracting 3 from the position of the previous letter (21 - 3 = 18, 18 - 3 = 15). The next letter will be the (15 - 3) = 12th letter, which is L.

Resulting Cluster

Combining the next elements from each progression (K, 36, L), the cluster that replaces the question mark is K36L.

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Similar Questions

  1. Select the alphanumeric-cluster from among the given options that can replace the question mark (?) in the given series.
    G7H, I9J, K11L, ?
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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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