4MA0 Higher January 2014 Paper 4 Q8
8 Express 825 as a product of its prime factors.
(3)
| Scheme | Marks |
|---|---|
| Fully correct factor tree or repeated division to reach prime factors (condone inclusion of 1’s) or 3, 5, 5, 11 or 3 x 5 x 5 x 11 x 1 | M2 |
| 3 x 5 x 5 x 11 | A1 |
| (3) | |
| (3 marks) |
Notes
M2: Factors must multiply to 825
If not M2 then M1 for correct but incomplete factor tree/ division ladder which includes 2 different primes.
(e.g. 25 x 3 x 11)
A1: cao Accept \(3 \times 5^2 \times 11\) and dots in place of multiplication signs.