Statements: All aeroplanes are trains. Some trains are chairs.
Conclusions:
Some aeroplanes are chairs.
Some chairs are aeroplanes.
Some chairs are trains.
Some trains are aeroplanes.
Options
A. None follows
B. Only I and II follow
C. Only II and III follow
D. Only III and IV follow
Correct Answer
Only III and IV follow
Explanation
Since the middle term 'trains' is not distributed even once in the/premises, no definite conclusion follows. However, III is the converse of the second premise while IV is the converse of the first premise. So, both of them hold.
More questions
1. Choose the picture that would go in the empty box so that the two bottom pictures are related in the same way as the top two:
Clearly, capability is an essential criteria for a profession and reservation cannot ensure capable workers. So, neither I nor III holds strong. However, making one caste more privileged than the other through reservations would hinder the objectives of a classless society. So, argument II holds strong.
7. Statement: 'Guests should be provided lunch.' - A tells B.
Clearly, mechanization would speed up the work and increase the production. So, argument I is strong enough. Argument II is vague because mechanization will only eliminate wasteful employment, not create unemployment.
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.