1 The sum of two irrational numbers is: A Sometimes rational, sometimes irrational B Always irrational C Always rational D Always an integer
10 The product of a rational and an irrational number is: A Always rational B Always irrational C Always zero D Sometimes rational
12 What is the scientific notation for 0.000890? A 8.90 × 10⁻⁴ B 8.90 × 10⁴ C 89.0 × 10⁻⁵ D 0.89 × 10⁻³
16 Which is the correct expansion of log₄(x/y)? A log₄ x - log₄ y B log₄ x + log₄ y C log₄ x / log₄ y D log₄ x * log₄ y