Odd sentence out in CAT: how to find the one that does not belong

Odd sentence out questions give you five jumbled sentences. Four of them, arranged properly, form a coherent paragraph. One does not belong, and you type its number.

It sounds like spotting the sentence on a different topic, and in easy sets it is. In CAT-level sets, all five sentences are usually on the same topic, and the odd one shares keywords with the rest. What sets it apart is its focus, not its subject. This guide shows how to see that difference reliably.

How the question is asked

In recent CAT papers, odd sentence out has been a type-in-the-answer (TITA) question: you enter a single number from 1 to 5. TITA questions carry no negative marking, so a wrong answer costs only the time.

What makes a sentence odd

The keyword trap is the one to master. A paragraph about bees as pollinators and a sentence about honey share the word "bees", but they answer different questions.

The method: build first, eliminate second

1. Read all five sentences and state the point, not the topic. "Bees" is a topic. "Declining bee numbers threaten food crops" is a point.
2. Find the mandatory pairs, exactly as in para jumbles: pronouns and their nouns, "therefore" and its cause, "this decline" and the decline.
3. Build the four-sentence paragraph from the pairs. Usually four sentences lock together through two or three links.
4. Test the leftover. Try inserting it at every position in your paragraph. If it breaks the flow everywhere, it is the answer.
5. Check the reverse. Make sure none of the four you kept could be removed without breaking a link. If one could, you may have the wrong odd sentence.

Worked example 1

1. Bees play an important role in pollinating many food crops.
2. Declining bee populations could therefore affect food supplies.
3. Honey has been used as a sweetener for thousands of years.
4. Scientists are studying the causes of this decline, including pesticides and the loss of habitat.
5. Protecting bees has become a concern for farmers and governments alike.

Point: bees matter for crops, their numbers are falling, and that is a concern.

Pairs. "Therefore" in 2 draws on the pollination role in 1, so 1 then 2. "This decline" in 4 points to the "declining bee populations" in 2, so 2 then 4. Sentence 5 draws the conclusion. The paragraph is 1-2-4-5.

Leftover: 3. It is about bees' honey, not their role in pollination or their decline. Wherever you insert it, it interrupts the argument. This is the keyword trap in its simplest form.

Answer: 3.

Worked example 2: a harder set

1. A museum label tells visitors not only what an object is but how they ought to look at it.
2. Calling a bowl "a ritual vessel" invites reverence; calling the same bowl "a kitchen pot" invites curiosity about daily life.
3. Curators therefore hold a quiet authority, shaping interpretation before visitors have formed a view of their own.
4. Many museums now offer free entry on one day a week to widen their audience.
5. Some institutions have responded by inviting members of the community to write labels alongside the experts.

Point: labels shape interpretation, which gives curators authority, and some museums are sharing that authority.

Pairs. Sentence 2 is an example of the claim in 1. "Therefore" in 3 draws a conclusion from 1 and 2. "Responded" in 5 needs something to respond to: the curators' authority in 3. The paragraph is 1-2-3-5.

Leftover: 4. It is about museums and widening participation, which makes it tempting, since sentence 5 is also about involving the public. But sentence 4 is about access (who gets in), while the paragraph is about interpretation (who decides what an object means). Free entry does nothing to curators' authority over labels.

Answer: 4.

When two sentences both look odd

Sometimes two sentences seem loosely attached. Then:

• Remove each in turn and read the remaining four. The correct set of four will have a clear chain; the wrong one will leave a pronoun or connector hanging.
• Check what each candidate would need. A sentence with "therefore", "this" or "responded" needs a partner, and if that partner is in the set, the sentence belongs.
• Prefer the sentence that answers a different question. If the paragraph asks "why do curators have power?", a sentence answering "how do museums attract visitors?" is out, even if it mentions museums.

Spend about two minutes. With no negative marking, always enter your best answer.

Practice set

Set A

1. When remote work spread, some commentators predicted that large cities would steadily lose residents.
2. Remote work also saves employees the time they would otherwise spend commuting.
3. The prediction assumed that people live in cities mainly to be near their jobs.
4. But cities also offer things that no video call can supply: crowds, chance meetings, a choice of schools and restaurants.
5. For many people, these attractions outweigh the cost of city rents, whether or not they go into an office.

Set B

1. Success in the role is therefore measured largely by absence: of controversy, of lost control, of argument.
2. A good referee is rarely noticed during a match.
3. Video review systems have made refereeing decisions more visible than ever.
4. This makes the job an unusually thankless one, since its best work leaves no trace.
5. Players, spectators and commentators talk about the referee mainly when something has gone wrong.

Set C

1. Some school systems now introduce handwriting later than they once did.
2. Students who take notes by hand cannot write as fast as they could type.
3. Typing, by contrast, lets a student capture a lecture almost word for word, which feels thorough but asks for little thought.
4. That act of selection is itself a form of learning, because it requires understanding the point being made.
5. The slower pace forces them to choose what to record and to put it in their own words.

Answers:

1. Set A: 2. The paragraph is 1-3-4-5: a prediction, the assumption behind it, what the assumption missed, and the conclusion ("these attractions" points to 4). Sentence 2 is a keyword trap: it is about remote work, but it discusses the benefit to employees, not whether cities lose residents.
2. Set B: 3. The paragraph is 2-5-1-4: the referee goes unnoticed, is discussed only when things go wrong, is therefore judged by absence, and "this" makes the job thankless. Sentence 3 is about technology making decisions visible, a different question, and no sentence links to it.
3. Set C: 1. The paragraph is 2-5-4-3: handwriting is slower, "the slower pace" forces selection, "that act of selection" is learning, and typing is the contrast. Sentence 1 shares the word "handwriting" but is about school curricula, not note-taking.

What to do next

• Do two odd-sentence sets a day for two weeks. Write the chain of four (for example 2-5-1-4) before typing the odd number.
• For each mistake, note which kind of odd sentence fooled you, using the table above.
• Alternate these with para jumbles and para summaries; all three test whether you can see a paragraph's single point.