Tier 2 Reasoning builds on everything from Tier 1 — but adds a few genuinely new question types that don't appear at all in the Tier 1 syllabus. This guide covers those new additions specifically, since they're the areas most likely to catch you off guard if you only prepared using Tier 1 material. Note: as with our other original Tier 2 content, these are practice problems built from the syllabus, not extracted from a verified real-PYQ dataset.
New Topic 1: Data Sufficiency
This question type gives you a question and two (or more) numbered statements. Your job isn't to solve the problem — it's to determine whether the given statements provide *enough* information to solve it, without actually calculating the answer.
Worked Example: Data Sufficiency
Q: What is the age of Ravi?
Statement I: Ravi is 5 years older than his brother Suresh.
Statement II: Suresh's age is 20 years.
1. Statement I alone is sufficient 2. Statement II alone is sufficient 3. Both statements together are sufficient, but neither alone 4. Neither statement is sufficient
Show Answer
Answer: 3. Statement I alone only gives a relative difference (5 years older), not an actual age. Statement II alone gives Suresh's age but says nothing about Ravi. Only combining both (Suresh is 20, Ravi is 5 years older) lets you calculate Ravi's age as 25.
Data Sufficiency: How to Approach It
- Read the question first, then evaluate each statement in isolation before considering them together
- Ask: "Could I calculate a definite, single answer using just this statement?" — not "does this seem helpful?"
- Only combine statements if neither works alone, and check if the combination gives one definite answer
- Watch for statements that seem to help but actually give a range or multiple possibilities rather than one fixed value — these are not sufficient
New Topic 2: Input-Output
This tests your ability to track a specific step-by-step process — usually numbers or words being rearranged according to a hidden rule across several steps, and you must identify the rule and predict a specific step.
Worked Example: Input-Output
Q: Input: 24 marble 12 kite 8 doll
Step I: 8 24 marble 12 kite doll
Step II: 8 12 24 marble kite doll
Step III: 8 12 24 doll kite marble
What is Step II based on the given rule?
Solution: The rule arranges numbers in ascending order at the start, and words alphabetically at the end, one step of each type completing per line. Step II moves the smallest remaining number (12) next to the already-placed 8, giving "8 12 24 marble kite doll" — numbers now fully sorted, words not yet.
Input-Output: How to Approach It
- Compare each step to the one before it — identify exactly what moved or changed position
- Numbers are often sorted ascending or descending; words are often sorted alphabetically or by length — check both possibilities
- Once you identify the rule from the given steps, apply it forward or backward as the question requires — don't assume the rule without verifying it against every given step
New Topic 3: Statement — Course of Action
You're given a real-world situation or problem statement, followed by two suggested "courses of action." You must judge whether each action is a sensible, practical response to the stated problem — this tests judgment, not pure logic.
Worked Example: Course of Action
Q: Statement: Several employees at a company have complained about slow internet speed affecting their work.
Course of Action I: The company should immediately terminate the internet service provider contract.
Course of Action II: The company should investigate the cause of the slowdown and consider upgrading the internet plan if needed.
Solution: Course of Action I is an extreme, premature response without understanding the actual cause. Course of Action II is a reasonable, proportionate first step. Only Course of Action II follows.
Statement-Based Reasoning: How to Approach It
- Look for actions that are proportionate to the stated problem — extreme or drastic actions are usually wrong unless the statement itself describes an extreme situation
- Prefer actions that investigate or address root causes over those that jump straight to a final, drastic decision
- Be wary of actions that sound reasonable but don't actually follow logically from the specific statement given
What Carries Over Directly From Tier 1
Analogy, Classification, Coding-Decoding, Blood Relations, Series, and non-verbal reasoning (mirror images, figure series) appear in both tiers with a similar format — your Tier 1 practice on these directly transfers. The topics above are the genuinely new additions to prioritize.
Frequently Asked Questions
Q1. Is Data Sufficiency difficult to master?
It's more about adjusting your instinct than learning new content — many aspirants initially want to solve the problem instead of just judging sufficiency, which wastes time. Practice specifically catching yourself before calculating a final answer.
Q2. How many questions typically test Input-Output in Tier 2?
This varies by paper, but it's a recurring, established topic worth dedicated practice rather than skipping — don't assume it's rare just because it's unfamiliar.
Q3. Is Statement-Course of Action subjective?
It can feel that way initially, but SSC's answer key generally favors moderate, investigative actions over extreme ones — practicing several examples builds a reliable instinct for this pattern.
For the complete Tier 2 picture, see our Tier 2 Syllabus & Exam Pattern and Tier 2 Preparation Strategy articles.
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