Correct Answer:
B. √2
Correct answer: √2. √2 = 1.41421… never ends or repeats, so it cannot be written as a fraction p/q.
Background: A rational number can be written as p/q with q ≠ 0.
- 3/2: 3/2 is a fraction, so it is rational.
- 25: 25 = 25/1, so it is rational.
- 1/4: 1/4 is a fraction, so it is rational.
Did you know? √3 and π are other famous irrational numbers.
Memory trick: Can be a fraction → rational.