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Question

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

1Z, 3X, 5V, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
7T

Alphanumeric Series Pattern Analysis

The question asks to find the missing term in the alphanumeric series: 1Z, 3X, 5V, ?

We need to identify the pattern in both the numbers and the letters separately.

Number Pattern

  • The sequence of numbers is 1, 3, 5, ...
  • The difference between consecutive numbers is constant: $3 - 1 = 2$ and $5 - 3 = 2$.
  • This is an arithmetic progression with a common difference of 2.
  • The next number in the sequence is $5 + 2 = 7$.

Letter Pattern

  • The sequence of letters is Z, X, V, ...
  • These letters are part of the English alphabet in reverse order.
  • Let's look at their positions in the alphabet: Z (26), X (24), V (22).
  • The difference between the positions is decreasing: $26 - 24 = 2$ and $24 - 22 = 2$.
  • The pattern is subtracting 2 from the position of the previous letter.
  • The position of the next letter is $22 - 2 = 20$.
  • The 20th letter in the English alphabet is T.

Combined Term Determination

Combining the next number (7) and the next letter (T), the missing term is 7T.

Conclusion

The term that replaces the (?) in the alphanumeric series 1Z, 3X, 5V is 7T.

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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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