Deductive and Inductive Reasoning - Logic - General Aptitude (GA) Previous Year Questions

1

2016 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2016

R2D2 is a robot. R2D2 can repair aeroplanes. No other robot can repair aeroplanes.
Which of the following can be logically inferred from the above statements?

A

R2D2 is a robot which can only repair aeroplanes.

B

R2D2 is the only robot which can repair aeroplanes.

C

R2D2 is a robot which can repair only aeroplanes.

D

Only R2D2 is a robot.

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2

2016 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2016

A poll of students appearing for masters in engineering indicated that 60 % of the students believed that mechanical engineering is a profession unsuitable for women. A research study on women with masters or higher degrees in mechanical engineering found that 99 % of such women were successful in their professions.
Which of the following can be logically inferred from the above paragraph?

A

Many students have misconceptions regarding various engineering disciplines.

B

Men with advanced degrees in mechanical engineering believe women are well suited to be mechanical engineers.

C

Mechanical engineering is a profession well suited for women with masters or higher degrees in mechanical engineering.

D

The number of women pursuing higher degrees in mechanical engineering is small.

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3

2016 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2016

Sourya committee had proposed the establishment of Sourya Institutes of Technology (SITs) in line with Indian Institutes of Technology (IITs) to cater to the technological and industrial needs of a developing country.
Which of the following can be logically inferred from the above sentence?
Based on the proposal,
(i) In the initial years, SIT students will get degrees from IIT.
(ii) SITs will have a distinct national objective.
(iii) SIT like institutions can only be established in consultation with IIT.
(iv) SITs will serve technological needs of a developing country.

A

(iii) and (iv) only.

B

(i) and (iv) only.

C

(ii) and (iv) only.

D

(ii) and (iii) only.

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4

2017 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2017

Four cards lie on a table. Each card has a number printed on one side and a colour on the other. The faces visible on the cards are 2, 3, red, and blue.
Proposition: If a card has an even value on one side, then its opposite face is red.
The cards which MUST be turned over to verify the above proposition are

A

2, red

B

2, 3, red

C

2, blue

D

2, red, blue

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5

2017 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2017

Bhaichung was observing the pattern of people entering and leaving a car service centre. There was a single window where customers were being served. He saw that people inevitably came out of the centre in the order that they went in. However, the time they spent inside seemed to vary a lot: some people came out in a matter of minutes while for others it took much longer.
From this, what can one conclude?

A

The centre operates on a first-come-first-served basis, but with variable service times, depending on specific customer needs.

B

Customers were served in an arbitrary order, since they took varying amounts of time for service completion in the centre.

C

Since some people came out within a few minutes of entering the centre, the system is likely to operate on a last-come-first-served basis.

D

Entering the centre early ensured that one would have shorter service times and most people attempted to do this.

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6

2017 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2017

A map shows the elevations of Darjeeling, Gangtok, Kalimpong, Pelling, and Siliguri.
Kalimpong is at a lower elevation than Gangtok. Pelling is at a lower elevation than Gangtok.
Pelling is at a higher elevation than Siliguri. Darjeeling is at a higher elevation than Gangtok.
Which of the following statements can be inferred from the paragraph above?
i. Pelling is at a higher elevation than Kalimpong
ii. Kalimpong is at a lower elevation than Darjeeling
iii. Kalimpong is at a higher elevation than Siliguri
iv. Siliguri is at a lower elevation than Gangtok

A

Only ii

B

Only ii and iii

C

Only ii and iv

D

Only iii and iv

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7

2017 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2017

P, Q, R, S, T and U are seated around a circular table. R is seated two places to the right of Q. P is seated three places to the left of R. S is seated opposite U. If P and U now switch seats, which of the following must necessarily be true?

A

P is immediately to the right of R

B

T is immediately to the left of P

C

T is immediately to the left of P or P is immediately to the right of Q

D

U is immediately to the right of R or P is immediately to the left of T

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8

2018 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2018

Consider the following three statements:
(i) Some roses are red.
(ii) All red flowers fade quickly.
(iii) Some roses fade quickly.
Which of the following statements can be logically inferred from the above statements?

A

If (i) is true and (ii) is false, then (iii) is false.

B

If (i) is true and (ii) is false, then (iii) is true.

C

If (i) and (ii) are true, then (iii) is true.

D

If (i) and (ii) are false, then (iii) is false.

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9

2020 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2020

P, Q, R, S, T, U, V, and W are seated around a circular table.
I. S is seated opposite to W.
II. U is seated at the second place to the right of R.
III. T is seated at the third place to the left of R.
IV. V is a neighbour of S.
Which of the following must be true?

A

P is a neighbour of R.

B

Q is a neighbour of R.

C

P is not seated opposite to Q.

D

R is the left neighbour of S.

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10

2021 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2021

Six students P, Q, R, S, T and U, with distinct heights, compare their heights and make the following observations.
Observation I: S is taller than R.
Observation II: Q is the shortest of all.
Observation III: U is taller than only one student.
Observation IV: T is taller than S but is not the tallest.
The number of students that are taller than R is the same as the number of students shorter than ________.

A

T

B

R

C

S

D

P

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11

2022 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2022

In the last few years, several new shopping malls were opened in the city. The total number of visitors in the malls is impressive. However, the total revenue generated through sales in the shops in these malls is generally low.
Which one of the following is the CORRECT logical inference based on the information in the above passage?

A

Fewer people are visiting the malls but spending more

B

More people are visiting the malls but not spending enough

C

More people are visiting the malls and spending more

D

Fewer people are visiting the malls and not spending enough

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12

2022 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2022

Given below are two statements and four conclusions drawn based on the statements.
Statement 1: Some soaps are clean.
Statement 2: All clean objects are wet.
Conclusion I: Some clean objects are soaps.
Conclusion II: No clean object is a soap.
Conclusion III: Some wet objects are soaps.
Conclusion IV: All wet objects are soaps.
Which one of the following options can be logically inferred?

A

Only conclusion I is correct

B

Either conclusion I or conclusion II is correct

C

Either conclusion III or conclusion IV is correct

D

Only conclusion I and conclusion III are correct

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13

2023 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2023

Residency is a famous housing complex with many well-established individuals among its residents. A recent survey conducted among the residents of the complex revealed that all of those residents who are well established in their respective fields happen to be academicians. The survey also revealed that most of these academicians are authors of some best-selling books.
Based only on the information provided above, which one of the following statements can be logically inferred with certainty?

A

Some residents of the complex who are well established in their fields are also authors of some best-selling books.

B

All academicians residing in the complex are well established in their fields.

C

Some authors of best-selling books are residents of the complex who are well established in their fields.

D

Some academicians residing in the complex are well established in their fields.

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14

2023 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2023

The information contained in DNA is used to synthesize proteins that are necessary for the functioning of life. DNA is composed of four nucleotides: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G). The information contained in DNA can then be thought of as a sequence of these four nucleotides: A, T, C, and G. DNA has coding and non-coding regions. Coding regions—where the sequence of these nucleotides are read in groups of three to produce individual amino acids—constitute only about 2% of human DNA. For example, the triplet of nucleotides CCG codes for the amino acid glycine, while the triplet GGA codes for the amino acid proline. Multiple amino acids are then assembled to form a protein.
Based only on the information provided above, which of the following statements can be logically inferred with certainty?
(i) The majority of human DNA has no role in the synthesis of proteins.
(ii) The function of about 98% of human DNA is not understood.

A

only (i)

B

only (ii)

C

both (i) and (ii)

D

neither (i) nor (ii)

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15

2026 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2026

Consider an art gallery whose walkways are shown as lines in the diagram. A black dot represents a junction of two walkways. A guard may be placed at a junction to watch over the walkways that join at that junction. The minimum number of guards needed to watch all the walkways is ________.

A

2

B

3

C

4

D

5

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16

2026 · General Aptitude (GA) · Logic · Deductive and Inductive Reasoning

Life Sciences (XL) 2026

Four people P, Q, R, and S, of different ages, make the following observations.
P – I am younger than S.
Q – I am neither the youngest nor the oldest.
R – P is older than me.
Based on these observations, the youngest person is ______.

A

P

B

Q

C

R

D

S

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