4400 Higher November 2004 Paper 4 Q14
14
(a) Find the Highest Common Factor of 75 and 105. (2)
(b) Find the Lowest Common Multiple of 75 and 105. (2)
| Scheme | Marks |
|---|---|
| \(75 = 3 \times 5^2\) and \(105 = 3 \times 5 \times 7\) or 1, 3, 5, 15, 25, 75 and 1, 3, 5, 15, 21, 35, 105 | M1 |
| 15 | A1 |
| (2) |
Notes
A1: cao
| Scheme | Marks |
|---|---|
| \(3 \times 5^2 \times 7\) or 75, 150, 225, 300, 375, 450, 525 and 105, 210, 315, 420, 525 | M1 |
| 525 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: Must be at least 3 correct in each list of multiples
A1: cao