Syllogism Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Syllogism. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 1 - Statements:

I. All jazz are melody.

II. No melody is a rock.

Conclusions:

I. No jazz is a rock.

II. At least some melody are jazz.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : E

Explanation

All jazz are melody (A) + no melody is a rock (E) = A + E = E = no jazz is a rock. Hence conclusion I follows. Again, all jazz are melody (A) – conversion – some melody are jazz (I). Hence conclusion II also follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 2 - Statements:

I. All batteries are torch.

II. No torch is a light.

Conclusions:

I. No battery is a light.

II. At least some torches are batteries.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : E

Explanation

All batteries are torches (A) + no torch is a light (E) = A + E = E = no battery is a light. Hence conclusion I follows. Again, all batteries are torches (A) – conversion – some torches are batteries (I). Hence conclusion II also follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 3 - Statements:

I. Some bananas are flowers.

II. No flower is yellow.

Conclusions:

I. Some flowers are bananas.

II. No banana is yellow

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : A

Explanation

Conclusion I is the immediate inference drawn from first statement. For mediate inference, I + E = O. Therefore, from the pair of statements, conclusion “some banana are not yellow” is valid. But this is not our conclusion. Hence only I follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 4 - Statements:

I. Some books are texts.

II. Some texts are copies.

Conclusions:

I. Some books are copies.

II. All copies are text.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : D

Explanation

Conclusion II is an immediate inference drawn from second statement and this is not valid as per rule of conversion. Conclusion I is a mediate inference. But as per table of mediate inference, I + I = no result. Hence none of the conclusions follow.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 5 - Statements:

I. Some banyans are oaks.

II. No oak is teak.

Conclusions:

I. Some oaks are banyans.

II. No banyan is teak.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : A

Explanation

Conclusion I is the immediate inference drawn from first statement. For mediate inference, I + E = O. Therefore, from the pair of statements, conclusion “some banyan are not teak” is valid. But this is not our conclusion. Hence only 1 follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 6 - Statements:

I. Some biology are zoology.

II. No zoology is a botany.

Conclusions:

I. No biology is a botany.

II. At least some biology are botany.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : C

Explanation

Some biology are zoology (I) + no zoology is a botany (E) = I &plus E = O = some biology are not botany. But conclusion I and II make a complementary pair (I - E). Hence either I or II follows. So option C is the right answer.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 7 - Statements:

I. All jeeps are cars.

II. Some cars are Hondas.

Conclusions:

I. Some Hondas are cars.

II. No jeeps is a Honda.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : A

Explanation

All jeeps are cars (A) + some car are Hondas (I) = A + I = no conclusion. Hence conclusion II does not follow. Again, some cars are Hondas (I) - conversion - some Hondas are car (I). Hence conclusion I follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 8 - Statements:

I. All fans are ACs.

II. No AC is a cooler.

Conclusions:

I. No fan is a cooler.

II. At least some ACs are fans.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : E

Explanation

All fans are ACs (A) + no AC is a cooler (E) = A + E = E = no fan is a cooler. Hence conclusion I follows. Again, all fans are ACs (A) - conversion - some ACs are fans (I). Hence conclusion II also follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 9 - Statements:

I. All MAJNUs are ROMEOs.

II. No ROMEO is a HEER.

Conclusions:

I. No MAJNU is a HEER.

II. At least some ROMEOs are MAJNUs.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : E

Explanation

All MAJNUs are ROMEOs (A) + no ROMEO is a HEER (E) = A + E = E = no MAJNU is a HEER. Hence conclusion I follows. Again, all MAJNUs are ROMEOs (A) - conversion - some ROMEOs are MAJNUs (I). Hence conclusion II also follows.

Two statements are given below followed by two conclusions numbered as I and II respectively. Consider the given statements as true even if they seem to be not. After reading all the conclusions conform which of the given conclusions logically follows, disregarding commonly known facts.

Q 10 - Statements:

I. All ducks are swans.

II. Some swans are kingfishers.

Conclusions:

I. Some kingfishers are swan.

II. No ducks is a kingfisher.

A - If only conclusion I follows.

B - If only conclusion II follows.

C - If either conclusion I or II follows.

D - If neither conclusion I nor II follows.

E - If both conclusion I and II follows.

Answer : A

Explanation

All ducks are swans (A) + some swans are kingfishers (I) = A + I = no conclusion. Hence conclusion II does not follow. Again some swans are kingfishers (I) - conversion - some kingfishers are swans (I). Hence conclusion I follows.

reasoning_syllogism.htm
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