Reasoning Ability - MCQ Practice Questions

Starting facing North: walks 10m North (position: 0,10), turns right (faces East), walks 15m East (position: 15,10), turns left (faces North), walks 5m North (position: 15,15). Final position is North-East from start.

From 'All doctors are professionals' and 'Some professionals are ethical', we cannot definitively conclude anything about the relationship between doctors and ethical people, as the 'some professionals' may or may not include doctors.

Pattern: (1×2)+1=3, (3×2)+1=7, (7×2)+1=15, (15×2)+1=31, (31×2)+1=63. The next term is 63.

D is between A and E means either A-D-E or E-D-A. B is between E and C means E-B-C. Combining: A-D-E-B-C satisfies both conditions.

ROAR is the sound a LION makes. Similarly, HISS is the sound a SNAKE makes. The relationship is animal to its characteristic sound.

In a 7-person circular arrangement with given constraints: A-C-D arrangement clockwise, E is 3rd right of A (which is 4th left, so 2 positions left of A in a 7-circle). Working through all constraints systematically places G immediately to the left of E.

If X is father of Y, and Y is brother of Z, then Z must be a child of X. Since Y is Z's brother, Z shares the same parents as Y. Therefore, X is the father of Z.

Understanding:

We need to determine how many steps are required to fully arrange the given input using the identified rule.

Step 1: Identify the Rule

From the original example:

Step 2: Apply to New Input

New Input: 81 run 35 win 19 joy 54 dog

Step 3: Count the Steps

There are 4 word-number pairs. Each step fixes one pair from the left:

So 3 steps are needed.

Answer:

The arrangement will be complete in 3 steps.

Quick Tip:

For n word-number pairs arranged one pair per step, the number of steps needed is always n − 1, since the last pair falls into place automatically.

Understanding:

We need to identify the rule governing the machine and determine which step produces the output: go 11 do 33 be 55 if 77, given the same input.

Step 1: Identify the Rule

From the original example:

Step 2: Identify the Input for the Target Output

Target output: go(11) do(33) be(55) if(77)

Step 3: Confirm

In the original example, Step 4 is the last step and produces the fully arranged output: sun 13 earth 47 moon 68 star 92. Similarly, for any 4-pair input, the fully sorted arrangement is achieved at Step 4.

The output go 11 do 33 be 55 if 77 is fully sorted (ascending numbers, paired words), so it corresponds to Step 4.

Answer:

The output go 11 do 33 be 55 if 77 is produced at Step 4.

Quick Tip:

For a machine that sorts n word-number pairs one pair per step, the fully sorted output always appears at Step n (the last step). The number of steps equals the number of pairs.

Understanding:

We need to find the number of steps to fully arrange the input: cold table bright warm ice strong.

Step 1: Identify the Rule

From the original example:

Step 2: Apply to New Input

New Input: cold table bright warm ice strong

Step 3: Count Steps

Exactly 4 steps are needed — the same as the original, since both inputs have 6 words and follow the same rule.

Answer:

The machine will take 4 steps to fully arrange the input cold table bright warm ice strong.

Quick Tip:

For n words sorted one per step where the last two auto-arrange, the number of steps = n − 2. Here n = 6, so steps = 4.

Understanding:

We need to apply the identified rule to find Step 2 of the new input.

Step 1: Identify the Rule

From the original example:

Alphabetical order of original: apple, mango, ocean, river, tiger.

→ apple mango tiger river ocean ✓

→ apple mango ocean tiger river → but Step 2 shows apple mango ocean tiger river ✓

→ apple mango ocean river tiger ✓

Rule: At each step, the next alphabetical word is placed at its correct position by swapping it with the word currently occupying that position.

Step 2: Apply to New Input

New Input: zebra kite park under bowl

Alphabetical order: bowl, kite, park, under, zebra.

Step 1: Place bowl (alphabetically 1st) at pos 1. Bowl is at pos 5; swap pos 1 (zebra) with pos 5 (bowl):

→ bowl kite park under zebra

Step 2: Place kite (alphabetically 2nd) at pos 2. Kite is already at pos 2 — no swap needed.

→ bowl kite park under zebra

Step 3 (if needed): Place park at pos 3 — already at pos 3.

→ bowl kite park under zebra (fully sorted — done in Step 1 effectively, but the machine still counts steps).

So Step 2 output = bowl kite park under zebra.

Answer:

Step 2 for the input zebra kite park under bowl is bowl kite park under zebra.

Quick Tip:

When the target word is already in its correct position, the step count still increments but the arrangement doesn't change visually. Always check whether the word to be placed is already correctly positioned before performing a swap.

Understanding:

We are given two statements and must check which conclusion logically follows.

Step 1: Test Conclusion I

Since ALL rivers flow into the sea, and the Ganga IS a river, it directly and necessarily follows that the Ganga flows into the sea. This is a valid syllogistic deduction.

Step 2: Test Conclusion II

The statements tell us what rivers do, not what feeds seas. A sea could theoretically exist without rivers, or be fed by other sources. The premise does not establish that ALL seas are fed by rivers. This conclusion goes beyond what is stated and is therefore invalid.

Answer:

Only Conclusion I follows logically from the given statements.

Quick Tip:

In Statement-Conclusion questions, a conclusion must follow directly and completely from the given statements — never assume extra information or reverse the direction of a universal statement.

Understanding:

We must evaluate whether each conclusion logically follows from the given statements.

Step 1: Test Conclusion I

The statement says regular exercise IMPROVES mental health. Ravi exercises every day, so it is reasonable to conclude that Ravi's mental health is improved, i.e., he has good mental health. This follows as a logical inference.

Step 2: Test Conclusion II

The statement says exercise improves mental health, but it does NOT say that exercise is the ONLY path to good mental health. Therefore, we cannot conclude that people who do not exercise necessarily have poor mental health. This conclusion introduces an assumption not supported by the statements.

Answer:

Only Conclusion I follows from the given statements.

Quick Tip:

Beware of conclusions that negate or reverse a given universal statement — they almost always introduce unwarranted assumptions.

Understanding:

We are given two premises and must determine which conclusion is valid.

Step 1: Test Conclusion I

From Premise 1, there exists a subset of politicians who are honest. From Premise 2, every honest person is respected. Combining these: that subset of politicians (who are honest) must also be respected. Therefore, SOME politicians are respected. This conclusion is valid.

Step 2: Test Conclusion II

Premise 1 says only SOME politicians are honest, not all. Since the path to being respected (via these premises) runs through honesty, we can only guarantee that SOME politicians are respected — not ALL. Conclusion II overstates the deduction and does not follow.

Answer:

Only Conclusion I follows from the given statements.

Quick Tip:

When a premise contains 'Some', the conclusion can never be 'All'. A particular premise limits the reach of any conclusion drawn from it.

Understanding:

We must judge the validity of each conclusion based strictly on the given statements.

Step 1: Test Conclusion I

Six hours per day clearly qualifies as 'too much' television by any reasonable interpretation of the phrase. Since too much television is harmful and Priya watches too much, it logically follows that her health is being harmed. Conclusion I follows.

Step 2: Test Conclusion II

The statement says 'too much' television is harmful — it does not say television in any amount is harmful. The word 'too much' itself implies that moderate watching could be acceptable. Therefore, concluding that children should not watch television AT ALL is an exaggeration not supported by the statement. Conclusion II does not follow.

Answer:

Only Conclusion I follows from the given statements.

Quick Tip:

Pay close attention to qualifying words like 'too much', 'some', 'always', 'never'. A conclusion that ignores the qualifier and makes an absolute claim is almost always invalid.

Understanding:

We are given two premises and must test each conclusion carefully.

Step 1: Test Conclusion I

All gold is precious, but precious things are NOT limited to gold only. Other things (diamonds, silver, etc.) can also be precious. So, the fact that no stone is gold does NOT mean no stone can be precious through some other route. Conclusion I oversteps the premises and does not follow.

Step 2: Test Conclusion II

Since all gold is precious, gold items are a subset of precious things. Since no stone is gold, those gold items (which are precious) are definitely not stones. Therefore, some precious things (namely, gold things) are not stones. This conclusion is valid and follows directly.

Answer:

Only Conclusion II follows from the given statements.

Quick Tip:

A Universal Negative (No A is B) combined with a Universal Affirmative (All B is C) does NOT allow you to conclude No A is C — other paths to C may exist outside B.

Understanding:

In Statement-Conclusion questions, conclusions must be drawn ONLY from the given statements, not from real-world knowledge.

Step 1: Test Conclusion I

The statement declares ALL birds can fly without exception, and penguins are identified as birds. By direct syllogism, penguins can fly. Even though we know in reality penguins cannot fly, we must judge based only on what the statements say. Conclusion I follows from the given premises.

Step 2: Test Conclusion II

The statement says ALL birds can fly, which means there is no bird that cannot fly as per the given statements. Conclusion II directly contradicts Statement 1 and therefore does NOT follow.

Answer:

Only Conclusion I follows when reasoning strictly from the given statements.

Quick Tip:

This question tests whether you can suspend real-world knowledge. In formal reasoning, you must accept the given statements as absolute truth and derive conclusions only from them — not from outside facts.

Understanding:

We must carefully note the qualifier in the statement before evaluating the conclusions.

Step 1: Test Conclusion I

Because the statement says 'MOST' (not 'all') students who study hard get good marks, there remains a possibility that Sneha could fall in the minority who do not. Saying she WILL (definitely) get good marks is too strong a claim. Conclusion I does not follow.

Step 2: Test Conclusion II

Since most hard-studying students do get good marks, and Sneha studies hard, it is quite probable — though not certain — that Sneha will get good marks. The word 'may' correctly captures this possibility without overstating certainty. Conclusion II follows.

Answer:

Only Conclusion II follows because 'most' introduces possibility, not certainty.

Quick Tip:

Words like 'most', 'many', 'generally', 'usually' in statements only justify conclusions with hedging words like 'may', 'might', or 'probably' — never absolute conclusions with 'will' or 'always'.

Understanding:

We must trace the logical chain through both premises carefully.

Step 1: Test Conclusion I

Fruits contain vitamins, and vitamins are essential for health. By the transitive property of universal affirmatives: All fruits → contain vitamins → are essential for health. Therefore, ALL fruits are essential for health. Conclusion I is valid.

Step 2: Test Conclusion II

Conclusion II reverses the direction of the logical chain. Just because all fruits are essential for health does not mean all things essential for health are fruits. Many other things (water, sleep, exercise) are also essential for health. This is an illegal conversion of a universal affirmative and Conclusion II does not follow.

Answer:

Only Conclusion I follows from the given statements.

Quick Tip:

Never reverse a universal affirmative (All A are B does NOT mean All B are A). This is one of the most common traps in syllogism and statement-conclusion questions.

Understanding:

We evaluate both conclusions against the given statements.

Step 1: Test Conclusion I

City X qualifies as a city with poor street lighting. The statement asserts that such cities have high crime rates. Therefore, it follows that City X has a high crime rate. Conclusion I is valid.

Step 2: Test Conclusion II

The statement establishes a correlation between poor lighting and high crime, but does NOT claim that street lighting is the sole cause of crime, nor that fixing it will eliminate crime entirely. Using 'definitely eliminate' is far too absolute and goes well beyond what the premises support. Conclusion II does not follow.

Answer:

Only Conclusion I follows from the given statements.

Quick Tip:

Correlation stated in a premise never justifies a conclusion about complete elimination or absolute causation. Watch for extreme words like 'definitely', 'completely', 'always', or 'eliminate' — they almost always make a conclusion invalid.