Mensa IQ Test Mensa IQ Syllogisms and Logical Arguments 3

Question 1

If all roses are flowers and some flowers fade quickly, which is a valid conclusion?

Accepted Answer

Nothing can be concluded about roses fading

Answer

Some roses fade quickly

Answer

All roses fade quickly

Answer

No roses fade quickly

Question 2

All successful students study hard. Tom did not study hard. Therefore:

Accepted Answer

Tom is not a successful student

Answer

Tom is a successful student

Answer

Some successful students don't study hard

Answer

Tom studies sometimes

Question 3

No cowards are heroes. Some soldiers are cowards. Which conclusion MUST be true?

Accepted Answer

Some soldiers are not heroes

Answer

No soldiers are heroes

Answer

All heroes are soldiers

Answer

Some cowards are soldiers

Question 4

All doctors are graduates. All graduates can think critically. Ram is a doctor. Which is true?

Accepted Answer

Ram can think critically

Answer

Ram cannot think critically

Answer

Ram is not a graduate

Answer

Nothing can be inferred about Ram

Question 5

Either the butler or the maid committed the crime. The maid is innocent. Therefore:

Accepted Answer

The butler committed the crime

Answer

Both are guilty

Answer

Neither is guilty

Answer

The case is unsolvable

Question 6

All X are Y. Some Z are not Y. Which conclusion is valid?

Accepted Answer

Some Z are not X

Answer

All Z are X

Answer

No Z are X

Answer

Some X are Z

Question 7

Person A says: 'All parrots are birds and can talk.' Person B counters: 'My parrot cannot talk.' What has Person B identified?

Accepted Answer

A counterexample disproving the universal claim

Answer

An irrelevant point

Answer

A supporting example

Answer

A circular argument