Higher June 2017 Paper 4 Q3
3
(a) Write 504 as the product of its prime factors. [3]
(b) Find the lowest common multiple (LCM) of 180 and 504. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(2 \times 2 \times 2 \times 3 \times 3 \times 7\) or \(2^3 \times 3^2 \times 7\) final answer | 3 | B2 for 2,2,2,3,3,7 or \(2^3\), \(3^2\), 7 or for a correct expression one stage short of the correct answer e.g. \(2^3 \times 9 \times 7\) or B1 for two of 2,3,7 identified | allow “.” for “×” and condone \(2^3\ 3^2\ 7\) for 3 marks for B1 and B2 allow factor tables and trees |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 2520 | 2 | M1 for factors of 180 = 2,2,3,3,5 oe or seen as factor tables and trees If 0 scored then SC1 for 2520\(n\) e.g. 90 720 | accept any correct method |