Statements: All scientists are fools.
All fools are illiterate.
Conclusion: I. All scientists are illiterate
II. All illiterate are scientists.
III. All illiterates are fools.
IV. Some illiterates would be scientiste.
Answer: Option [A]
The area for scientists lies entirely in the area for illiterates. So, conclusion i follows. The area I does not lie completely within S or entirely within F. So, conclusions ii and iii cannot follow. Since illiterates and scientists have a common area, conclusion iv follows. Thus, only conclusion i and iv follow.
Statements: All bags are pockets.
No pocket is pounch.
Conclusion: I. No pounch is bag.
II. Some slates are pockets.
Answer: Option [A]
Statements: All soaps are detergents.
All detergents are powerders.
Conclusion: I. All soaps are powerders.
II. Some detergents are soaps.
III. Some powerders are soaps.
IV. Some powerders are detergents.
Answer: Option [D]
The area for soaps lies entirely within the area for powder. So, conclusion I follows. Detergents and soaps have a common area, powders and soaps have a common area and powders and detergents have a common area, So, conclusions II, III and IV also follow. Thus all the conclusions follow
Statements: Some phones are computers.
All computers are radios.
All radios are televisions.
Conclusion: I. All televisions are computers.
II. Some radios are phone.
Answer: Option [B]
Statements: Some clocks are watches.
Some watches are walls.
Some walls are houses.
Some houses are rooms.
Conclusion: I. Some rooms are walls.
II. Some houses are clocks.
III. No room is wall.
Answer: Option [D]
Hence conclusion either I or III follows