4MA0 Foundation June 2016 Paper 1R Q21
21 Write 792 as a product of its prime factors.
Show your working clearly.
(3)
| Scheme | Marks |
|---|---|
| 792 = 2 × 396 = 2 × 2 × 198 = 2 × 2 × 2 × 99 = 2 × 2 × 2 × 3 × 33 | M1 |
| 2, 2, 2, 3, 3, 11 | A1 |
| 2 × 2 × 2 × 3 × 3 × 11 | A1 |
| (3) |
Notes
M1: For at least 2 correct steps in repeated factorisation (may be seen in a tree diagram or ‘ladder’)
A1: Condone inclusion of 1 (maybe a fully correct tree or factor ladder)
A1: Or \(2^3 \times 3^2 \times 11\)
NB: Candidates showing no working score 0 marks