Higher November 2019 Paper 5 Q13
13
(a)
(i) Write \(\frac{1}{3}\) as a recurring decimal. [1]
(ii) Write \(\frac{1}{30}\) as a recurring decimal. [1]
(b) Simplify fully by rationalising the denominator.
\(\dfrac{20}{\sqrt{5}}\) [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| (i) [0].\(\dot{3}\) | 1 | Condone e.g. [0].3\(\dot{3}\) | |
| (ii) [0].0\(\dot{3}\) | 1 | Condone e.g. [0].03\(\dot{3}\) | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(4\sqrt{5}\) | 3 | B2 for \(\frac{20\sqrt{5}}{5}\) or M1 for \(\frac{20}{\sqrt{5}} \times \frac{\sqrt{5}}{\sqrt{5}}\) or better | |