IBPS Syllogism 3

Question 1

Statements: Some apples are mangoes. All mangoes are grapes. Conclusions: I. All apples are grapes. II. Some grapes are apples. Which conclusion(s) follow?

Accepted Answer

Only II follows

Answer

Some apples are mangoes and all mangoes are grapes, so some apples are grapes; by conversion, some grapes are apples (Conclusion II follows); 'All apples are grapes' cannot be concluded since only some apples are mangoes.

Question 2

Statements: All rivers are lakes. No lake is a pond. Conclusions: I. No river is a pond. II. Some ponds are not lakes. Which conclusion(s) follow?

Accepted Answer

Only I follows

Answer

All rivers are lakes and no lake is a pond, so no river is a pond (Conclusion I follows); Conclusion II states some ponds are not lakes, which is the converse of 'No lake is a pond' and is valid but not a standard necessary conclusion here — Conclusion I definitively follows.

Question 3

Statements: Some doctors are engineers. Some engineers are pilots. Conclusions: I. Some doctors are pilots. II. Some pilots are doctors. Which conclusion(s) follow?

Accepted Answer

Neither I nor II follows

Answer

With two particular affirmative premises, no definite conclusion can be drawn; the set of engineers that are doctors may be entirely different from the set of engineers that are pilots.

Question 4

Statements: All squares are rectangles. No rectangle is a circle. Conclusions: I. No square is a circle. II. Some circles are not rectangles. Which conclusion(s) follow?

Accepted Answer

Both I and II follow

Answer

All squares are rectangles and no rectangle is a circle, so no square is a circle (I follows); since no rectangle is a circle, some circles are definitely not rectangles (II follows by obversion).

Question 5

Statements: All gold is silver. Some silver is bronze. Conclusions: I. Some gold is bronze. II. Some bronze is silver. Which conclusion(s) follow?

Accepted Answer

Only II follows

Answer

Some silver is bronze, so by conversion, some bronze is silver (Conclusion II follows); there is no direct link proving some gold is bronze, so Conclusion I does not follow.

IBPS - Institute of Banking Personnel Selection Practice Test

IBPS - Institute of Banking Personnel Selection Practice Test

IBPS Syllogism 3