Mensa Mensa IQ Deductive Reasoning Puzzles 2

Question 1

All roses are flowers. Some flowers fade quickly. Therefore, which conclusion is valid?

Accepted Answer

No valid conclusion can be drawn

Answer

All roses fade quickly

Answer

Some roses fade quickly

Answer

No flowers are roses

Question 2

If no cats are dogs and all tigers are cats, what must be true?

Accepted Answer

No tigers are dogs

Answer

Some tigers are dogs

Answer

All dogs are tigers

Answer

Some dogs are cats

Question 3

Tom is taller than Sara. Sara is taller than Mike. Mike is taller than Joe. Who is shortest?

Accepted Answer

Joe

Answer

Tom

Answer

Sara

Answer

Mike

Question 4

Every member of the club pays dues. Raj does not pay dues. Therefore:

Accepted Answer

Raj is not a member

Answer

Raj is a member

Answer

Raj pays dues sometimes

Answer

Some members skip dues

Question 5

Some students are athletes. All athletes are healthy. Which follows?

Accepted Answer

Some students are healthy

Answer

All students are healthy

Answer

No students are healthy

Answer

All healthy people are students

Question 6

If it rains, the match is cancelled. The match was not cancelled. What can be concluded?

Accepted Answer

It did not rain

Answer

It rained

Answer

It might have rained

Answer

The match was postponed

Question 7

No reptiles are mammals. Some pets are reptiles. Therefore:

Accepted Answer

Some pets are not mammals

Answer

All pets are mammals

Answer

No pets are reptiles

Answer

All reptiles are pets