Question

Fact 1: Eyeglass frames cost between $35 and $350.
Fact 2: Some eyeglass frames are made of titanium.
Fact 3: Some eyeglass frames are made of plastic.
If the first three statements are facts, which of the following statements must also be a fact?
I: Titanium eyeglass frames cost more than plastic frames.
II: Expensive eyeglass frames last longer than cheap frames.
III: Only a few eyeglass frames cost less than $35.

Answer 1

None of the statements is a known fact.

BECAUSE

There is no information in the facts to support statements I or II.

Statement III is clearly wrong because, according to Fact 1, no frames cost less than $35.