Mensa IQ Test Mensa IQ Deductive Reasoning Puzzles Questions and Answers 3

Question 1

In a race, Alex finishes before Ben but after Cara. Dan finishes after Ben. Who finished last?

Accepted Answer

Dan

Answer

Order from first to last: Cara → Alex → Ben → Dan. Dan finishes last.

Question 2

No fish can walk. Some swimmers are fish. Therefore:

Accepted Answer

Some swimmers cannot walk

Answer

The fish that are also swimmers cannot walk (since no fish can walk). So some swimmers (the fish ones) cannot walk.

Question 3

A man says, 'Brothers and sisters I have none, but this man's father is my father's son.' Who is in the portrait?

Accepted Answer

The man's son

Answer

The man has no siblings. 'My father's son' = himself. So 'this man's father is me' — meaning the portrait shows the man's son.

Question 4

Statements: 1) All mammals are warm-blooded. 2) Whales are mammals. Conclusion: Whales are warm-blooded. Is the conclusion:

Accepted Answer

True

Answer

Classic syllogism: All mammals are warm-blooded + Whales are mammals → Whales are warm-blooded. The conclusion necessarily follows.

Question 5

If today is Wednesday, what day will it be 100 days from now?

Accepted Answer

Thursday

Answer

100 ÷ 7 = 14 remainder 2. Moving 2 days forward from Wednesday gives Friday. Wait — 14×7=98, remainder=2. Wednesday + 2 = Friday.

Mensa Practice Test Practice Test