Foundation June 2019 Paper 1 Q2
2
(a) Write down each of the following.
(i) An odd number. [1]
(ii) A factor of 25. [1]
(iii) A prime number between 20 and 30. [1]
(b) Show that 55 is not a square number. [2]
| Answer | Marks | Part marks and guidance |
|---|---|---|
| (i) Any odd number | 1 | Accept more than 1 if all correct |
| (ii) 1, 5 or 25 | 1 | If more than one, all must be correct (condone factor products) |
| (iii) 23 or 29 | 1 | Accept both |
| Answer | Marks | Part marks and guidance |
|---|---|---|
| Explanation based on \(\sqrt{55}\) or \(7^2\) and \(8^2\) eg \(\sqrt{55}\) is between 7 and 8 or 55 is between 49 and 64 [so it cannot be a square number] \(\sqrt{55}\) [= 7.4..] is not a whole number | 2 | B1 for 7.4… or \(7^2 = 49\) or \(8^2 = 64\) or \(7^2\) and \(8^2\) or 49 and 64 e.g. \(\sqrt{55} = 7.4\) |