Inference Questions

Draw logical inferences from passage evidence

30 practice questionsPage updated 25 Sept 2026Reviewed by AISEA Editorial DeskPractice questions

An inference is a conclusion supported by the evidence in a passage, even when the conclusion is not stated word for word. In aptitude exams, the correct option is the most logical and rational conclusion that follows with the fewest extra assumptions. The current bank uses inference, corollary, practical implication and multi-statement formats, so track the author's claim, evidence, qualifiers and limits before judging an option.

Key formulas and rules

5 rules

Formal Inference Criterion: $\text{Passage Premises } (P) \vdash \text{Conclusion } (C) \iff P \land \neg C \text{ is a logical contradiction}$

Modal Strength Matching: Passage with weak modal verbs ( $\text{may, might, could, possible}$ ) supports only weak modal conclusions; cannot support strong modals ( $\text{must, will, always, impossible}$ )

Correlation vs Causation Guard: $(A \text{ correlates with } B) \not\implies (A \text{ causes } B)$ ; common cause $C$ or reverse causation $B \to A$ cannot be ruled out without evidence

Evidence Matrix Ledger: Tabulate: $[\text{Stated Fact}] \to [\text{Scope Boundary}] \to [\text{Permissible Logical Leap}] \to [\text{Valid Conclusion}]$

Multi-Statement Verification: Evaluate statements $S_1, S_2, S_3$ independently with truth values $\{0, 1\}$ before selecting combined options (e.g. Only I and III)

Key concepts

Read for the claim, not only the topic

Worked examples

Example 1

Passage: A city installed water meters in a pilot district. Reported losses from undetected leaks fell, but the report notes that the reduction depended on regular meter maintenance and prompt repairs.

Question: Which inference is best supported?

Solution

Step 1: Evidence = metering was followed by fewer undetected leaks in the pilot.
Step 2: Limitation = maintenance and repairs affected the result.
Step 3: The strongest inference preserves both points.
Answer: Water metering can reduce losses when it is supported by maintenance and prompt repairs. It does not establish that meters alone will eliminate leakage everywhere.

Example 2

Passage: Industrial bank credit has declined. The passage says that a market economy needs a way for weak banks to fail or be resolved, but no proper system currently allows banks to be shut down.

Question: What is the most logical inference?

Solution

Step 1: The passage directly connects the problem to the absence of a resolution mechanism.
Step 2: The supported inference is institutional, not a claim that every bank is unable to support growth.
Answer: The banking system lacks an adequate institutional mechanism for dealing with bank failure. Claims about foreign investment or the complete failure of economic reforms go beyond the passage.

Example 3

Passage: Some renewable technologies are still moving down their cost and learning curves. Businesses are therefore cautious about investing heavily before the technologies can deliver the required output.

Question: Which conclusion follows most directly?

Solution

Step 1: The passage identifies immature cost and performance conditions.
Step 2: It describes business caution as a response to those conditions.
Answer: Bringing some renewable technologies to market too early may be costly. The passage does not prove that the technologies will fail or that investment should stop permanently.

Example 4

Passage: A study found that students who used a quiet study room scored higher on a later test. The researchers did not randomly assign students to rooms and did not record how much time each student studied.

Question: Which inference is justified?

Solution

Step 1: The study reports an association between using the room and higher scores.
Step 2: Without random assignment and study-time data, the passage does not establish that the room caused the higher scores.
Answer: Quiet-room users scored higher in this study, but the evidence is insufficient to conclude that the room alone caused the improvement.

Example 5

Passage: A company allowed remote work. Productivity increased in teams whose tasks were mostly independent, while teams requiring frequent equipment sharing saw little change. The company is reviewing equipment and coordination practices.

Question: Which statements are supported?
1. The effect of remote work can depend on the type of task.
2. Equipment and coordination may influence the result.
3. Remote work always increases productivity.

Solution

Step 1: Statement 1 follows from the different results for independent and equipment-sharing teams.
Step 2: Statement 2 follows from the reported review of equipment and coordination.
Step 3: Statement 3 is contradicted by the teams that saw little change and is too absolute.
Answer: Statements 1 and 2 only.

Example 6

Passage: Country A produces more wheat than any other country. The passage gives no information about its exports or imports.

Question: Which inference is valid?

Solution

Step 1: The only established comparison concerns production.
Step 2: Exporting and importing are different activities and are not determined by production rank alone.
Answer: Country A is the largest producer of wheat. It cannot be inferred that it is the largest exporter or that it does not import wheat.

Example 7

Passage: Rainfall is concentrated in a short season, while many regions face shortages later in the year. Rivers also carry unused water to the sea during heavy rainfall.

Question: Which practical implication is most consistent with the passage?

Solution

Step 1: Problem = seasonal concentration and later shortages.
Step 2: Evidence = some water flows away unused during the wet period.
Step 3: A proportionate response is to improve storage and distribution for later use.
Answer: Rainwater storage and distribution systems should be strengthened. A specific river-linking law or unlimited groundwater extraction is not established by the passage.

Example 8

Passage: A laboratory observed that a new treatment was associated with faster recovery in a small group. The researchers describe the result as preliminary and call for a larger controlled study.

Question: What is the author's level of confidence?

Solution

Step 1: ‘Associated’ avoids a definite causal claim.
Step 2: ‘Preliminary’ and the call for a controlled study limit confidence.
Answer: Cautiously hopeful but uncertain. The passage supports further testing, not a claim that the treatment is proven effective.

Example 9

Passage: A survey found that households with access to public libraries borrowed more books. It did not measure reading habits in households without library access, and it did not examine whether frequent readers were more likely to seek library access.

Question: Which conclusion is NOT established?

Solution

Step 1: The survey establishes an association between library access and borrowing.
Step 2: It does not establish the direction of causation or rule out pre-existing reading habits.
Answer: Public-library access causes households to read more. That causal conclusion requires evidence the survey did not collect.

Representative solved questions

See the kind of question in this topic before opening the full practice set.

Question 1

Passage:
In India, over the last decade or so, labour has been departing agriculture, but is only going to construction and unregistered manufacturing which are not markedly better jobs. Services, where labour tends to be most productive, are not generating the additional jobs the country needs. India will need 24 million or so jobs over the next decade. The new sector, e-commerce, can at best close only half the jobs gap. Only those sectors that drive domestic demand such* as health and education can comfortably fill the other half.
Question: Which one of the following is best implied in the passage?

Strong measures need to be taken to reduce the rural to urban migration of labour.
The working condition in construction and unregistered manufacturing needs to be improved.
Service sector has been reducing the problem of unemployment.
Increased social sector spending is imperative for large-scale job creation.

Answer: D. Increased social sector spending is imperative for large-scale job creation.

Explanation

“Increased social sector spending is imperative for large-scale job creation.” is correct: Increased social sector spending is imperative for large-scale job creation. It follows most directly from the passage. The relevant clue is that the new sector, e-commerce, can at best close only half the jobs gap. Only those sectors that drive domestic demand such as health and education can comfortably fill the other half. The other options either narrow the point, overstate it, or add claims not made in the passage.

Sources and review notes

This is an AISEA-authored practice question.

Review status: accepted · Reviewed 2026-08-13 · structure and answer-key checks, editorial quality checks, duplicate screening

Question 2

Passage:
Many opportunities to harness the highly skewed, seasonal and spatial distribution of monsoon flows, which occur in a four-month period from June to September annually, have been lost. Since these few months account for most of the rainfall and consequent freshwater availability, the need for holding rainwater in reservoirs, for subsequently releasing it for use over the year, is a necessity nobody can afford to overlook. Climate change will continue to affect weather conditions and create water shortages and excesses. While millions suffer from droughts and floods, waters in the country's many rivers flow unutilized, and are discharged into the sea every year.
Question: With reference to the above passage, which of the following could be the most rational and practical implications for India?
1. Inter-linking of rivers should be undertaken.
2. A network of dams and canals should be built across the country for proper distribution of water.
3. Farmers should be provided easy loans for digging borewells.
4. Usage of water for agriculture should be regulated by law.
5. Distribution of river water among regions should be regulated by the Union Government.
Select the correct answer using the code given below.

1 and 2
2, 4 and 5
1, 3 and 4
2, 3 and 5

Answer: A. 1 and 2

Explanation

“1 and 2” is correct: 1 and 2. It follows most directly from the passage; the other options either overstate the author's claim or introduce points that the passage does not establish.

Sources and review notes

This is an AISEA-authored practice question.

Review status: accepted · Reviewed 2026-08-13 · structure and answer-key checks, editorial quality checks, duplicate screening

Question 3

Passage:
India is at once among the fastest growing global economies and home to the largest number of malnourished children in the world. There are regions where malnutrition is not the exception but the norm. And across the country, malnutrition is the cause of death for roughly half the 13 million children who die before their fifth birthday each year. Even those children who survive suffer permanently from the damage that has already been done to their bodies and minds from not getting enough of the right foods and nutrients. Around 44 million children under 5 are stunted. That makes it harder for them to learn in school and subsequently earn a living as adults. Their lifetime earnings potential is almost a quarter less than that of their healthy peers.
Question: With reference to the above passage, which of the following is/are the most rational and practical implication/ implications?
1. India's Public Distribution System should be monitored by the Union Government.
2. Girls should be encouraged to delay marriage and first pregnancy.
3. Mothers should be encouraged to breastfeed their children immediately after birth.
4. The supply of safe drinking water and proper sanitation facilities to all should be ensured.
5. Authorities should ensure the vaccination as prescribed.
Select the correct answer using the code given below.

1, 2, 3 and 4
2, 3, 4 and 5
1 only
3 and 5 only

Answer: B. 2, 3, 4 and 5

Explanation

“2, 3, 4 and 5” is correct: 2, 3, 4 and 5. It follows most directly from the passage; the other options either overstate the author's claim or introduce points that the passage does not establish.

Sources and review notes

This is an AISEA-authored practice question.

Review status: accepted · Reviewed 2026-08-13 · structure and answer-key checks, editorial quality checks, duplicate screening

Types of InferencesOpenStax · Checked 2 Sep 2026Supports: inference as a conclusion drawn from evidence and the difference between probable and guaranteed conclusions

Reverse OutliningGeorge Mason University Writing Center · Checked 2 Sep 2026Supports: extracting each paragraph's main idea and tracking how it functions in the whole argument

Active Reading 3: Targeted Reading for Articles TranscriptPurdue Online Writing Lab · Checked 2 Sep 2026Supports: separating ideas from evidence and avoiding selective reading or loss of context

Inference Questions

Key formulas and rules

Key concepts

Read for the claim, not only the topic

Separate fact, inference and opinion

Use the smallest logical bridge

Preserve scope and qualifiers

Do not confuse association with causation

Distinguish necessity from possibility

Evaluate practical implications carefully

Handle corollaries and scientific passages

Solve multi-statement inference sets

Use option elimination and a counterexample

Respect what the passage does not establish

Worked examples

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Example 8

Example 9

Representative solved questions

Question 1

Question 2

Question 3

Common mistakes and useful habits

Sources and review notes

Ready to test your understanding?

Key formulas and rules

Key concepts

Read for the claim, not only the topic

Separate fact, inference and opinion

Use the smallest logical bridge

Preserve scope and qualifiers

Do not confuse association with causation

Distinguish necessity from possibility

Evaluate practical implications carefully

Handle corollaries and scientific passages

Solve multi-statement inference sets

Use option elimination and a counterexample

Respect what the passage does not establish

Worked examples

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Example 8

Example 9

Representative solved questions

Question 1

Question 2

Question 3

Common mistakes and useful habits

Sources and review notes

Ready to test your understanding?

Keep building the same skill family.