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Deductive Reasoning

Q.No: 1
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
123
B
356
C
341
D
125
Answer key/Solution
Solution:
If all copper is used for pins and some tin is also copper, then it follows that some pins are made of tin.
Q.No: 2
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
251
B
125
C
453
D
532
Answer key/Solution
Solution:
If all birds lay eggs and ostrich is a bird, it follows that ostrich also lays eggs.
Q.No: 3
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
254
B
246
C
612
D
621
Answer key/Solution
Solution:
If all wood is good and all wood is paper, it follows that some paper is also good.
Q.No: 4
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
513
B
234
C
123
D
543
Answer key/Solution
Solution:
If all bricks are tricks and all tricks are shrieks, then some shrieks should be bricks.
Q.No: 5
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
231
B
165
C
453
D
354
Answer key/Solution
Solution:
If all sandal is band and all band is sand, it follows that some sand is band.
Q.No: 6
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
256
B
632
C
126
D
245
Answer key/Solution
Solution:
All life is strife and all that is wife is life, therefore all wife is also strife.
Q.No: 7
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
123
B
356
C
145
D
542
Answer key/Solution
Solution:
All owls are mosquitoes but some owls are flies, therefore some flies are also mosquitoes.
Q.No: 8
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
145
B
123
C
156
D
543
Answer key/Solution
Solution:
Six is five but some six is twelve, therefore some twelve is also five.
Q.No: 9
Test Name : CAT Paper 1996

Direction for questions 36 to 44: Given below are six statements followed by sets of three. You are to mark the option in which the statements are most logically related.

A
145
B
123
C
234
D
456
Answer key/Solution
Solution:
Although this doesn't seem convincing, but if we look at it from purely logical point of view, then if poor girls want to marry rich boys, and rich boys want to marry rich girls, then logically poor girls want to marry rich girls.
Q.No: 10
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. Some of my closest friends disapprove of me.
B. Some of my closest friends are aardvarks.
C. All of my closest friends disapprove of me.
D. All who disapprove of me are aardvarks.
E. Some who disapprove of me are aardvarks.
F. Some of my closest friends are no aardvarks.

A
BCD
B
ABD
C
BCE
D
ABE
Answer key/Solution
Solution:
Q.No: 11
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. All those who achieve great ends are happy.
B. All young people are happy.
C. All young people achieve great ends.
D. No young people achieve great ends.
E. No young people are happy,
F. Some young people are happy.

A
ADE
B
ABF
C
ACB
D
ADF
Answer key/Solution
Solution:
Q.No: 12
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. All candid men are persons who acknowledge merit in a rival.
B. Some learned men are very candid.
C. Some learned men are not persons who acknowledge merit in a rival.
D. Some learned men are persons who are very candid.
E. Some learned men are not candid.
F. Some persons who recognize merit in a rival are learned.

A
ABE
B
ACF
C
ADE
D
BAF
Answer key/Solution
Solution:
Q.No: 13
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. All roses are fragrant.
B. All roses are majestic.
C. All roses are plants.
D. All roses need air.
E. All plants need air.
F. All plants need water.

A
CED
B
ACB
C
BDC
D
CFE
Answer key/Solution
Solution:
Q.No: 14
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. All men are men of scientific ability.
B. Some women are women of scientific ability.
C. Some men are men of artistic genius.
D. Some men and women are of scientific ability.
E. All men of artistic genius are men of scientific ability.
F. Some women of artistic genius are women of scientific ability.

A
ACD
B
ACE
C
DEF
D
ABC
Answer key/Solution
Solution:
Q.No: 15
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. No fishes breathe through lungs.
B. All fishes have scales.
C. Some fishes breed up stream.
D. All whales breathe through lungs.
E. No whales are fishes.
F. All whales are mammals.

A
ABC
B
BCD
C
ADE
D
DEF
Answer key/Solution
Solution:
Q.No: 16
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. Some mammals are carnivores.
B. All whales are mammals.
C. All whales are aquatic animals.
D. All whales are carnivores.
E. Some aquatic animals are mammals.
F. Some mammals are whales.

A
ADF
B
ABC
C
AEF
D
BCE
Answer key/Solution
Solution:
Q.No: 17
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. First-year students of this college like to enter for the prize.
B. All students of this college rank as University students.
C. First-year students of this college are entitled to enter for the prize.
D. Some who rank as University students are First-year students.
E. All University students are eligible to enter for the prize.
F. All those who like to are entitled to enter for the prize.

A
AEF
B
ABC
C
BEC
D
CDF
Answer key/Solution
Solution:
Q.No: 18
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. Some beliefs are uncertain.
B. Nothing uncertain is worth dying for.
C. Some belief is worth dying for.
D. All beliefs are uncertain.
E. Some beliefs are certain.
F. No belief is worth dying for.

A
ABF
B
BCD
C
BEF
D
BDF
Answer key/Solution
Solution:
Q.No: 19
Test Name : CAT Paper 1990
Questions 41 to 50: Each of these questions contains six statements followed by four sets of combinations of three. Choose the set in which the statements are most logically related.

A. No lunatics are fit to serve on a jury.
B. Everyone who is sane can do logic.
C. None of your sons can do logic.
D. Some who can do logic are fit to serve on a jury.
E. All who can do logic are fit to serve on a jury.
F. Everyone who is sane is fit to serve on a jury.

A
BDE
B
BEF
C
BDF
D
ADE
Answer key/Solution
Solution:
Solution:
If all copper is used for pins and some tin is also copper, then it follows that some pins are made of tin.

Solution:
If all birds lay eggs and ostrich is a bird, it follows that ostrich also lays eggs.

Solution:
If all wood is good and all wood is paper, it follows that some paper is also good.

Solution:
If all bricks are tricks and all tricks are shrieks, then some shrieks should be bricks.

Solution:
If all sandal is band and all band is sand, it follows that some sand is band.

Solution:
All life is strife and all that is wife is life, therefore all wife is also strife.

Solution:
All owls are mosquitoes but some owls are flies, therefore some flies are also mosquitoes.

Solution:
Six is five but some six is twelve, therefore some twelve is also five.

Solution:
Although this doesn't seem convincing, but if we look at it from purely logical point of view, then if poor girls want to marry rich boys, and rich boys want to marry rich girls, then logically poor girls want to marry rich girls.

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