Answer and explanation

Correct answer: C. 9

  1. Step 1: The denominator 3 means cube root: .
  2. Step 2: The numerator 2 means square: .
Answer
9.
Why not the others: 18: this multiplies 27 by 2/3 rather than using the fractional power. 81: this is , from using the wrong power on the cube root. 3: this is only the cube root of 27 and the square was forgotten.

Practise more Expressions, Formulae and Relationships.

Free questions with an explanation for every one, and full timed National 5 (Scotland) mock tests.