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Question

Few of the letters are given followed by a question mark (?) these letters are following a specific pattern you have to give the correct option which can replace question mark.

Identify the next term: C, E, G, I, ?

This question was previously asked in
SSC CHSL 2025 Tier 1 Question Paper (21-Nov-2025) (Shift 1)
The correct answer is

K

In an alphabet series each letter can be turned into its position number in the alphabet, and the numeric rule behind those positions tells us which letter comes next.

Convert the given terms to their positions: C is the 3rd letter, E the 5th, G the 7th, and I the 9th.

The position numbers read \(3, 5, 7, 9\), and each value is exactly 2 more than the one before it, an arithmetic pattern with a common difference of 2.

Because the gap is 2, the series simply picks every alternate letter, skipping one letter of the alphabet at each step.

To find the next term, add the common difference to the last position: \(9 + 2 = 11\).

The 11th letter of the English alphabet is K, which fits the alternate-letter pattern C, E, G, I, K.

The concept is mapping letters to ordinal positions and continuing the constant-gap sequence, so the term that replaces the question mark is K.

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Important Questions from Alphabet Series

  1. A series is given with some letters missing. Choose the correct alternative from the given ones that will complete the series:

    BR __ __ NB __ O __ NB
  2. A series is given with some letters missing. Choose the set of letters which when sequentially placed shall complete it .

    a __ __ dba __ __ bcad __ __ da __ __ cd
  3. In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below It. Choose the correct alternative

    _ a _ b _ abaa _ bab _ abb
  4. In the series _b_a_ba_b_abab_aab;

    fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.

  5. In the series AABABCABCDABCDE..., which letter appears at the 100th place?

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