SSC CGL 2025 Tier-I · 16 September 2025, Shift 1 · General Intelligence and Reasoning · Question 6 of 100

We transcribed this text from the pictures on a candidate's response sheet for this shift; the answer is the key SSC colour-marked on that sheet. Solution last reviewed 13 September 2026.

Where this paper and its answers come from

SSC does not publish CGL question papers or a public answer key. From 2025 the candidate response sheet prints every question and option as a picture, so the text here is transcribed from those pictures for this shift and checked against them independently; where the layout carries meaning, the picture is shown as well. Each answer is the key SSC colour-marked on that sheet. SSC released a tentative key for challenge and later its final one, both only to candidates behind a login, and the sheet does not say which of the two it carries. The solutions are written by UnlockIAS.

Find the odd one out:

(a)A@1A,
(b)B@2B,
(c)C@4C,
(d)D@4D

Answer

Why

Correct — C.
Rule: the number is the letter's position in the alphabet, with the letter on both sides of @.

A@1A: A = 1 ✓
B@2B: B = 2 ✓
D@4D: D = 4 ✓
C@4C: C = 3, not 4 → option (c).

Why the others are wrong

(a)
A@1A, — A@1A fits the rule: A is the 1st letter of the alphabet and carries 1.
(b)
B@2B, — B@2B fits the rule: B is the 2nd letter and carries 2.
(d)
D@4D — D@4D fits the rule: D is the 4th letter, so its 4 is right. The same 4 is wrong beside C, the 3rd letter.

Concept

An odd-one-out item gives four entries built the same way and asks which one breaks the shared rule. Look for the link between the parts of each entry.

Here each entry is a letter, @, a number and the same letter again. The link is alphabet position: A = 1, B = 2, D = 4. C is the 3rd letter, so C@4C carries the wrong number.

Options (a) to (c) are printed with a trailing comma and (d) without one. The comma sits outside the letter–number pattern, so it cannot decide the odd one out.

Key facts

A = 1, B = 2, C = 3, D = 4 in the English alphabet.
C@4C would fit the rule as C@3C.

Study next

Letter-position values A = 1 to Z = 26Odd one out among letter–number pairsCoding letters by alphabet position

Common traps

Picking (d) because it shares the 4 with (c), when 4 is right for D
Treating the missing comma after D@4D as the difference

Here SSC prints four letter–symbol–number codes, and the odd one breaks the link between a letter and its alphabet position.

Related PYQs

No directly related past PYQ was found.

Topic: Semantic Classification — all 59 SSC CGL questions on it, every solved shift.