Foundation November 2020 Paper 2 Q12
12
(a) Write down all the factors of 9 (1)
(b) Find the lowest common multiple (LCM) of 15 and 70 (2)
| Scheme | Marks |
|---|---|
| 1, 3, 9 | B1 |
| (1) |
Notes
B1: need all three but ignore any repeats
| Scheme | Marks |
|---|---|
| 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210 and 70, 140, 210 OR 3 × 5 and 2 × 5 × 7 OR 2 × 3 × 5 × 7 (2, 3, 5, 7) oe eg 3 × 5 × 14 (3, 5, 14)  | M1 |
| 210 | A1 |
| (2) | |
| (3 marks) |
Notes
M1: for listing at least three multiples of 15 and 70 or finding the prime factors of 15 and 70 (could be factors at the ends of branches of factor trees or lists 3, 5 and 2, 5, 7) or a correct calculation or the correct values for the LCM eg 2,3,5,7 or 3,5,14 oe (could be in a table)