Mensa IQ Test Mensa IQ Logical Deduction Problems

Question 1

All roses are flowers. Some flowers fade quickly. What can be deduced?

Accepted Answer

Some roses may fade quickly

Answer

All roses fade quickly

Answer

No roses fade quickly

Answer

All flowers are roses

Question 2

If it rains, the ground gets wet. The ground is not wet. What can you conclude?

Accepted Answer

It is not raining

Answer

It is raining

Answer

The ground is wet

Answer

Nothing can be concluded

Question 3

Alice is taller than Bob. Bob is taller than Charlie. What is true?

Accepted Answer

Alice is taller than Charlie

Answer

Charlie is taller than Alice

Answer

Bob is the tallest

Answer

Alice and Charlie are the same height

Question 4

No fish can fly. All salmon are fish. What can be deduced about salmon?

Accepted Answer

No salmon can fly

Answer

Some salmon can fly

Answer

All salmon can fly

Answer

Salmon might fly

Question 5

If A implies B, and B implies C, what can we conclude?

Accepted Answer

A implies C

Answer

C implies A

Answer

B implies A

Answer

A and C are unrelated

Question 6

In a room of 5 people, everyone shakes hands with everyone else exactly once. How many handshakes occur?

Accepted Answer

10

Answer

20

Answer

15

Answer

25

All roses are flowers.Some flowers fade quickly.What can be deduced?