SSC CGL 2025 Tier 1 Reasoning PYQ – 18 Sep 2025 Shift 3 (24 Questions with Solutions)

SSC CGL 2025 Reasoning PYQ, 18 Sep Shift 3: Series, Coding and Puzzles

This set is for SSC CGL aspirants at the practice stage who want real Tier 1 reasoning questions from the General Intelligence and Reasoning section of 18 September 2025, Shift 3. It covers series, coding, blood relations, analogies and logical statements. Students at Aptitude360 in Chandigarh and online learners can review the method behind most answers through worked solutions.

Reasoning areas in this Shift 3 set

• Letter-cluster series and alphabet-shift analogies
• Number series with changing differences and finding the wrong term
• Symbol-based operations and sign interchange
• Blood relations from pointing statements
• Coding-decoding by shifting letters
• Statement and conclusion, and statement and assumption
• Odd one out, including a sea among oceans
• A floor-wise arrangement puzzle and word analogies

Handy rules for series and coding

• Position of a letter from the end: \( 27-n \)
• Sum of the first n odd numbers: \( n^{2} \)
• nth term of an arithmetic series: \( a_{n}=a+(n-1)d \)
• Sum of n terms: \( S_{n}=\dfrac{n}{2}[2a+(n-1)d] \)

How to sharpen CGL reasoning

• In number series, write the differences first and check if they follow a pattern
• For blood relations, sketch a family tree showing male and female members
• After every sign swap, apply BODMAS strictly

Is this set right for you?

It suits SSC CGL aspirants who know the basic reasoning question types and want to try them on an actual Tier 1 shift.