TMUA Logic Drill · Counterexample Trap

Medium · Paper 2 Style

Which value of x disproves the statement:

If x² > 9, then x > 3.

A. x = 2 B. x = 3 C. x = -4 D. x = 4

Correct answer: C

Solution: A counterexample must make the first part true and the second part false. For x = -4, x² = 16 > 9, but x > 3 is false.