GCAT Logical Deduction Problems 4

Question 1

Six people — F, G, H, I, J, K — are seated in two rows of three facing each other. F faces G. H is to the right of F. I is to the left of G. Who sits opposite H?

Accepted Answer

I

Answer

F faces G; H is to F's right in one row; I is to G's left in the opposite row, placing I directly opposite H.

Question 2

No cold-blooded animals are mammals. Dolphins are mammals. Which conclusion is logically valid?

Accepted Answer

Dolphins are not cold-blooded

Answer

Since dolphins are mammals and no mammals are cold-blooded, dolphins cannot be cold-blooded.

Question 3

Whenever there is fog, flights are delayed. Flights are delayed today. What can you conclude?

Accepted Answer

There may or may not be fog today

Answer

Fog causes delays, but delays can have other causes, so fog is not guaranteed from delays alone.

Question 4

All fast runners are good athletes. Mark is not a good athlete. What must be true about Mark?

Accepted Answer

Mark is not a fast runner

Answer

By contrapositive, if Mark is not a good athlete, he cannot be a fast runner.

Question 5

Three friends each prefer a different color: red, blue, or green. Anna does not like red. Ben does not like blue. If Carlos likes green, what does Anna like?

Accepted Answer

Blue

Answer

Carlos takes green, leaving red and blue; Anna cannot have red, so Anna must like blue.

GCAT - General Cognitive Ability Test Practice Test

GCAT - General Cognitive Ability Test Practice Test

GCAT Logical Deduction Problems 4