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Question

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

E, J, O, T, ?

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

Series Pattern Analysis

The question presents a series of letters: E, J, O, T, ?. We need to find the pattern governing this sequence to determine the next letter.

Alphabetical Position Calculation

Let's assign numerical positions to each letter based on its place in the alphabet:

  • E is the 5th letter.
  • J is the 10th letter.
  • O is the 15th letter.
  • T is the 20th letter.

The numerical sequence is: $5, 10, 15, 20, ?$.

Observe the difference between consecutive numbers:

  • $10 - 5 = 5$
  • $15 - 10 = 5$
  • $20 - 15 = 5$

The pattern is adding 5 to the position of the previous letter.

Identifying the Next Letter

To find the position of the next letter, add 5 to the position of T (which is 20):

$20 + 5 = 25$

The 25th letter in the alphabet is Y.

Therefore, the letter that replaces the question mark is Y.

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