GCAT Syllogistic Reasoning 4

Question 1

All fast runners are fit. Tom is not fit. What follows about Tom?

Accepted Answer

Tom is not a fast runner.

Answer

By contrapositive, if someone is not fit then they are not a fast runner.

Question 2

Some roses are red. All red flowers are beautiful. Which must be true?

Accepted Answer

Some roses are beautiful.

Answer

The red roses must be beautiful, making at least some roses beautiful.

Question 3

All A are B. Some B are C. No C are D. Which is a valid conclusion about A and D?

Accepted Answer

No conclusion about A and D.

Answer

Since 'some B are C' is particular, we cannot determine whether any A fall in that subset, making a conclusion about A and D impossible.

Question 4

No lazy person succeeds. All successors are respected. Which is valid?

Accepted Answer

No conclusion about lazy and respected.

Answer

The premises don't connect lazy people to the respected group — lazy people are outside the successor set, but we don't know if the respected group extends beyond successors.

Question 5

All judges are lawyers. All lawyers passed the bar. Sandra passed the bar. What follows?

Accepted Answer

Sandra might be a judge.

Answer

Passing the bar is necessary but not sufficient to be a lawyer or judge, so Sandra might or might not be a judge.

GCAT - General Cognitive Ability Test Practice Test

GCAT - General Cognitive Ability Test Practice Test

GCAT Syllogistic Reasoning 4