Foundation June 2023 Paper 3 Q13
13
(a) \(2a = \sqrt{b}\) where \(b\) is a positive integer from 8 to 17.
Given that \(a\) is a positive integer, find its value.
You must show your working. [2]
(b) How would your answer to part (a) change if \(a\) was only described as an integer? [1]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\sqrt{16} = 4\) or \(4^2 = 16\) | M1 | Ignore other correct roots e.g. \(\sqrt{9} = 3\) unless these used to reach answer. | |
| 2 | A1 | If 0 scored, SC1 for answer 2 with no or confused or insufficient working | Must just be 2 |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| It would not change oe | 1 | The square root symbol only gives the positive root, so no change oe | |