Syllogism Quiz for IBPS RRB PO 2017 : Set – 5

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Syllogism Quiz for IBPS RRB PO 2017. Welcome to Online Reasoning Section in letsstudytogether.co Here we are providing a set of Reasoning Ability Quiz IBPS exams 2017  on Reverse Syllogism.

Syllogism Quiz for IBPS RRB PO 2017


 Direction ( 1- 6 )  In this question two statements followed by two conclusions numbered I and II have been given. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

1.

Statements:  Some heads are tails.
Some coins are heads.

Conclusions:

I. At least some tails are heads.
II. Some tails being coins is a possibility.

1) Either conclusion I or II follows.
2) Neither conclusion I nor II follows.
3) Both conclusions I and II follow.
4) Only conclusion I follows.
5) Only conclusion II follows.

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3; Some heads are tails (I) – conversion – Some tails are heads (I). Hence conclusion I follow. There is no negative statement. Hence the possibility in II exists. Hence conclusion II follows.

 

2. 

Statements: All reviews are observations.
All comments are reviews.

Conclusions:

I. All observations are comments.
II. No observation is a comment.

1) Only conclusion II follows.
3) Both conclusions I and II follow.
3) Neither conclusion I nor II follows.
4) Only conclusion I follows.
5) Either conclusion I or II follows.

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3; All comments are reviews (A) + All reviews are observations (A) = A + A = All comments are observations (A). Hence I does not follow. Again, there is no negative statement. Thus, a negative conclusion can not follow. Hence II also does not follow.

3.

Statements:

No mountain is a cliff.
Some cliffs are rocks.

Conclusions:

I. No mountain is a rock.
II. All rocks can never be mountains.

1) Only conclusion I follows.
2) Neither conclusion I nor II follows.
3) Both conclusions I and II follow.
4) Either conclusion I or II follows.
5) Only conclusion II follows.

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5. No mountain is a cliff (E) + Some cliffs are rocks (I) = E + I = O* = Some rocks are not mountains. Hence conclusion I does not follow. But II follows.

 

4.

Statements: All amounts are principles.
Some principles are balances.

Conclusions:

I. All balances being amounts is a possibility.
II. Some balances are definitely not principles.

1) Neither conclusion I nor II follows.
2) Either conclusion I or II follows.
3) Only conclusion II follows.
4) Only conclusion I follows.
5) Both conclusions I and II follow.

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4; All amounts are principles (A) + Some principles are balances (I) = A + I = No conclusion. But the possibility in I exists. Hence conclusion I follows. Again, Some principles are balances (I) – conversion – Some balances are principles (I). Hence II does not
follow.

5.

Statements: All posts are mails.
No mail is a letter.

Conclusions:

I. No post is a letter.
II. At least some posts are letters.

1) Both conclusions I and II follow.
2) Only conclusion II follows.
3) Either conclusion I or II follows.
4) Only conclusion I follows.
5) Neither conclusion I nor II follows.

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4; All posts are mails (A) + No mail is a letter (E) = A + E = E = No post is a letter. Hence I follows. But II does not follow.

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Directions (Q. 6-10): In each question below are given statements followed by five conclusions (numbered 1), 2), 3), 4) and 5)). You have to assume everything in the statements to be true even if they seem to be at variance with commonly known facts and then find out which of the five given conclusions does not logically follow from the statements, disregarding commonly known facts.

6. 

Statements: Some numbers are letters.
No letter is a vowel.
All vowels are words.

Conclusions:

1) Some numbers are not vowels.
2) No vowel is a letter.
3) Some words are not letters.
4) Some numbers are words.
5) Some words are vowels.

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4; Some numbers are letters (I) + No letter is a vowel = I + E = O = Some numbers are not vowels. Hence conclusion 1) follows.

No letter is a vowel (E) ? conversion ? No vowel is a letter (E). Hence conclusion 2) follows.
No letter is a vowel (E) + All vowels are words (A) = E + A = O* = Some words are not letters. Hence 3) follows.
Now, Some numbers are not vowels (O) + All vowels are words (A) = O + A = No conclusion. Hence conclusion 4) does not follow.
Are all vowels words (A) ? conversion ? Some words are vowels (I). Hence conclusion 5) follows.

7.

Statements: All papers are pages.
Some pages are books.
All books are copies.

Conclusions:

1) All papers being copies is a possibility.
2) Some papers are books.
3) Some copies are pages.
4) Some pages are papers.
5) All books being papers is a possibility.

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2; There is no negative statement. Thus the possibilities in 1) and 5) exist. Hence conclusion 1) and 5) both follow.
All papers are pages (A) + Some pages are books (I) = A + I = No conclusion. Hence conclusion 2) does not follow.
Some pages are books (I) + All books are copies (A) = I + A = I = Some pages are copies (I). Hence conclusion 3) follows.
All papers are pages (A) ? conversion ? Some pages are papers (I). Hence conclusion 4) follows.

8.

Statements: No cup is a glass.
Some glasses are bottles.
All bottles are caps.

Conclusions:

1) Some glasses are caps.
2) Some bottles are not cups.
3) Some caps are cups.
4) Some caps are bottles.
5) No glass is a cup.

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3; Some glasses are bottles + All bottles are caps = I + A = I = Some glasses are caps. Hence I follows.

No cup is a glass (E) ? conversion ? No glass is a cup (E). Hence conclusion 5) follows.

No cup is a glass (E) + Some glasses are bottles (I) = E + I = O* = Some bottles are not cups (O*). Hence conclusion 2) follows.
Some bottles are not cups (O*) + All bottles are caps (A) = O* + A = No conclusion. Hence conclusion 3) does not follow.
All bottles are caps (A) ? conversion ? Some caps are bottles (I). Hence conclusion 4) follows.

9.

Statements: All kicks are sticks.
No stick is a brick.
Some bricks are stones.

Conclusions:

1) No kicks are bricks.
2) Some stones are not sticks.
3) Some stones are bricks.
4) All bricks being kicks is a possibility.
5) No brick is a stick.

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4; All kicks are sticks (A) + No stick is a brick (E) = A + E = E = No kick is a brick. Hence conclusion 1) follows.
No stick is a brick (E) + Some bricks are stones (I) = E + I = O* = Some stones are not sticks. Hence conclusion 2) follows.
Some bricks are stones (I) ? conversion ? Some stones are bricks (I). Hence conclusion 3) follows.
4) does not follow from conclusion 1). No stick is a brick (E) ? conversion ? No brick is a stick (E). Hence conclusion 5) follows.

10.

Statements: All birds are swans.
All swans are ducks.
Some ducks are parrots.

Conclusions:

1) All birds being parrots is a possibility.
2) Some swans are parrots.
3) Some ducks being birds is a possibility.
4) Some swans are not parrots.
5) No swan is a bird.

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5; There is no negative statement. Thus the possibilities in 1) and 3) exist. Hence conclusion 1) and 3) follow.
All swans are ducks (A) + Some ducks are parrots (I) = A + I = No conclusion. But there are complementary statements of conclusions 2) and 4). Hence either conclusion II or IV follows.
All birds are swans (A) ? conversion ? Some swans are birds (I). Hence conclusion 5) does not follow.


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