VARC
Critical Thinking in RC
A one-page CAT 2026 VARC reference to the reasoning skills behind reading comprehension — separating fact from opinion, finding conclusions and assumptions, weighing evidence, spotting fallacies,…
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Odd One Out
CAT'26 VARC CHEATSHEET
Every theme test, linking clue and elimination rule you need for CAT 2026 — on one page.
Odd One Out looks like a para jumble with one extra sentence, and that's exactly the trap. All the sentences sit on the same topic by design, so "which one feels unrelated" gets you nowhere — the odd sentence is the one no other sentence needs. The reliable method is to name the theme, build the core set that genuinely links through connectors, pronouns and repeated keywords, and see what's left standing alone. This cheat sheet covers the theme test, core-set building, the linking clues that glue sentences together, and the four shifts (topic, scope, tone, abstraction) that give the outsider away. Every box carries a worked mini-example, and because these are TITA questions with no negative marking, there's a timing rule here too. It sits alongside the rest of Optima Learn's CAT preparation; once you're timing full sets, check where you stand with the CAT score predictor.
Odd One Out: every rule you need
1What Odd One Out Tests
Four or five sentences; all but one form a coherent paragraph.
Find the sentence that no other sentence needs — not the one that "feels" unrelated.
Example: Five sentences on urban traffic; four build one argument about congestion pricing, the fifth defines a traffic signal. Answer: the standalone definition.
CAT Insight: it's usually TITA — you type the sentence number, so there's no negative marking.
2Name the Theme First
Read all sentences, then state the shared idea in your own words.
Theme = the specific point the paragraph is making, not the broad topic.
Example: The topic is "coffee"; the theme is "how climate change threatens arabica yields." A sentence on coffee-shop culture fails the theme. Answer: the culture sentence.
Common Mistake: settling for the broad topic — every sentence passes that test by design.
3Build the Core Set
Pair the sentences that clearly link; the leftover is your candidate.
Link 2, then 3, then 4 — the sentence that joins nothing is the odd one.
Example: S3 introduces a study, S1 reports its result, S4 draws the implication — a chain of three. S2 attaches to none. Answer: S2.
CAT Hack: find the strongest pair first; the paragraph usually grows outward from one obvious link.
4Connectors & Pronouns Are Glue
However, therefore, this, these, such — each points at another sentence.
A backward-looking pronoun must follow something — it can't be the outsider.
Example: "This failure prompted a rethink" needs a prior failure, so it belongs to the paragraph. Answer: rule it out as the odd one.
CAT Favourite: pronoun-referent chains are the single most reliable way to lock the core set.
5Spot the Topic Shift
Same broad subject, different sub-topic — the classic outsider.
The odd sentence answers a different question from the rest.
Example: Four sentences on how AI models are trained; one on who regulates AI. Same field, different question. Answer: the regulation sentence.
CAT Hack: ask what question each sentence answers — the odd one answers its own.
6Spot the Scope Shift
A sentence that zooms too far in or too far out breaks the paragraph.
The paragraph holds one level of generality; the odd one changes it.
Example: Four sentences about one city's water policy; one makes a global claim about all developing nations. Answer: the global-claim sentence.
Common Mistake: keeping a sweeping sentence because it "sounds like a conclusion."
7Spot the Tone Shift
A neutral sentence among critical ones, or the reverse, is the outsider.
The paragraph keeps one stance; a stance break marks the odd one.
Example: Four sentences criticising a subsidy; one praises its rollout with no qualification. Answer: the approving sentence.
CAT Insight: tone shift is subtler than topic shift — check it when topic alone leaves you with two candidates.
8Abstract vs Concrete Mismatch
A lone abstract claim among concrete details rarely belongs.
Check the register: the odd one often sits at a different level of abstraction.
Example: Three sentences with dates and figures on a factory closure; one offers a philosophical remark on labour and dignity. Answer: the philosophical sentence.
CAT Hack: abstraction mismatch is a fast tiebreak when topic and tone both look fine.
9The Orphan Test
Remove your candidate — do the rest still read as one paragraph?
Delete it: if the paragraph tightens, it was the odd one; if it breaks, it wasn't.
Example: Pull S4 out and S1–S2–S3 flow cleanly with no gap. Answer: S4 is the odd one.
CAT Favourite: the delete-and-reread check is the safest final confirmation before you type the answer.
10Use the Opener & the Closer
Find the sentence that can start, and the one that can end.
Openers carry no back-reference; closers conclude or resolve.
Example: Two sentences look like openers — only one fits the theme; the other is stranded. Answer: the off-theme opener.
CAT Hack: two plausible openers is a strong signal that one of them is the odd sentence.
11Chronology & Sequence
Time markers order the paragraph and expose the misfit.
Then, later, by 1990, subsequently — these fix a sentence's slot.
Example: Three sentences trace a reform from 1991 to 2005; one describes a present-day unrelated debate. Answer: the present-day sentence.
CAT Insight: a sentence with no slot in the timeline is usually the one outside the paragraph.
12Keyword Chains
Repeated terms thread the paragraph; the odd one drops the thread.
Track the recurring noun — the sentence that never picks it up stands out.
Example: "Migration" recurs in four sentences; the fifth talks only about urban housing stock. Answer: the housing sentence.
Common Mistake: trusting a shared keyword alone — the odd sentence often reuses the word in a different sense.
13Splitting the Final Two
Down to two candidates — keep the one the paragraph actually needs.
Ask which sentence, if removed, leaves a gap. That one stays.
Example: S2 and S5 both look loose; removing S2 leaves a dangling "this," removing S5 changes nothing. Answer: S5.
CAT Hack: the paragraph needs its links, not its content — test necessity, not relevance.
14TITA Strategy & Timing
No negative marking, so never leave one blank — but cap your time.
Budget about 90 seconds; if stuck, take your best candidate and move on.
Example: Two candidates left at 90 seconds — type the weaker-linked one and move to the RC set. Answer: always enter something.
CAT Favourite: a free guess on a TITA question costs nothing but a blank scores zero — always attempt.
CAT exam shortcuts, traps & revision
15CAT Exam Shortcuts
- Read all sentences before deciding anything
- Name the theme, not the topic, in your own words
- Build the core set from the strongest link outward
- Pronouns and connectors rule a sentence in, not out
- Check the four shifts: topic, scope, tone, abstraction
- Delete your candidate and reread to confirm
16Most Common CAT Traps
- Eliminating on topic alone — every sentence shares the topic.
- Keeping a sweeping sentence because it sounds like a conclusion.
- Trusting a repeated keyword used in a different sense.
- Calling a pronoun-carrying sentence the odd one.
- Ignoring a tone or abstraction shift when topic looks fine.
- Leaving a TITA question blank when a guess is free.
1730-Second Revision
- Theme in your own words
- Build the core set; find the orphan
- Pronouns / connectors = belongs
- Shifts: topic, scope, tone, abstraction
- Delete and reread to confirm
- TITA: never leave it blank
Odd One Out rewards a method, not instinct — once you're building the core set instead of hunting for the "unrelated" sentence, these stop costing you three minutes each. Drill this sheet on real CAT sets, and after every attempt name which shift gave the odd sentence away. For more VARC guides, browse the Optima Learn blog or explore every study guide, and work through the full CAT exam hub for section-wise strategy. When you want structured, mentor-led prep, the team at Optima Learn can map out your plan — book a free CAT 2026 call and line up your next few weeks.
