Both the Premises are Universal Affirmative (A-type).
All peacocks are crows. ? All crows are birds.
A + A ? A-type of Conclusion "All peacocks are birds."
This is Conclusion I.
First Premise is Particular Affirmative (I?type).
Second Premise is Universal Affirmative (A?type).
All insects are ants. ? Some ants are flies.
A + I ? No Conclusion
Conclusion II is the Converse of the second Premise.
First Premise is Universal Affirmative (A?type).
Second Premise is Universal Negative (E?type).
All mangoes are golden in colour. It implies that all mangoes without an exception are golden in colour.
No golden coloured things are cheap.
Thus, Conclusion II follows.
All animals (without exception) are four?footed.
Dog has two legs. Therefore dog is not an animal.
Thus, only Conclusion I follows.
All the singers are fat and Ankit is a singer. So, Ankit is fat.
First Premise is Particular Affirmative (I-type).
Second Premise is Universal Affirmative (A-type).
All centuries are decades. ? Some decades are years.
A + I ? No Conclusion
Conclusion II is Converse of the first Premise.
Conclusions I and III form Complementary Pair. Therefore, either I or III follows.
Both the Premises are Universal Affirmative (A?type).
All squares are rectangles. ? All rectangles are polygons.
A + A ? A?type of Conclusion "All squares are polygons."
Thus, square is rectangle (given) and square is polygon (derived).
Mary always tells the truth. Therefore, both Mary and Ann have cats. Clearly, Ann is lying. Thus, all the Conclusions I, II and III follow.
First Premise is Universal Affirmative (A-type).
Second Premise is Particular Affirmative (I-type).
Some men are stenographers. ? All stenographers are lazy.
I + A ? I-type of Conclusion "Some men are lazy".
This is Conclusion II.
All the three Premises are particular (I?type). No Conclusion follows from the two particular premises.
Both the Premises are Universal Affirmative (A ? type).
Rajiv is a boy. ? All boys are tall.
A + A ? A-type of Conclusion "Rajiv is tall".
This is Conclusion I.
Venn diagrams:
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