Mensa IQ Test Mensa IQ Syllogisms and Logical Arguments 2

Question 1

All squares are rectangles. All rectangles are parallelograms. Which conclusion is VALID?

Accepted Answer

All squares are parallelograms

Answer

All parallelograms are squares

Answer

No squares are parallelograms

Answer

Some rectangles are not squares

Question 2

Some birds cannot fly. All penguins are birds. Which conclusion is DEFINITELY valid?

Accepted Answer

All penguins are birds

Answer

Some penguins cannot fly

Answer

All birds cannot fly

Answer

Some birds can fly

Question 3

No vegetarians eat meat. Jane is a vegetarian. Therefore:

Accepted Answer

Jane does not eat meat

Answer

Jane sometimes eats meat

Answer

Some vegetarians eat meat

Answer

Jane eats only vegetables

Question 4

All politicians are public speakers. Some liars are politicians. Which conclusion follows?

Accepted Answer

Some liars are public speakers

Answer

All public speakers are liars

Answer

No liars are public speakers

Answer

All liars are politicians

Question 5

Premise 1: If it rains, the ground gets wet. Premise 2: The ground is wet. What can we conclude?

Accepted Answer

It may or may not have rained

Answer

It rained

Answer

It did not rain

Answer

The ground is always wet

Question 6

All A are B. No B are C. Which conclusion is VALID?

Accepted Answer

No A are C

Answer

Some A are C

Answer

All C are A

Answer

Some B are A

Question 7

Some cats are black. Some black things are cars. Which conclusion MUST follow?

Accepted Answer

Nothing must follow

Answer

Some cats are cars

Answer

No cats are cars

Answer

Some black cats are cars