4MA0 Foundation June 2011 Paper 2 Q24
24 Express 126 as a product of its prime factors.
(3)
| Scheme | Marks |
|---|---|
| A product of 3 or more factors of which 2 are from 2, 3, 3, 7 | M1 |
| All 4 correct prime factors & no extras (ignore 1’s) 2, 3, 3, 7 or 2, 3, 3, 7, 1 or 2 × 3 × 3 × 7 × 1 | A1 |
| 2 × 3 × 3 × 7 | A1 |
| (3) | |
| (Total 3 marks) |
Notes
M1: e.g 2 × 3 × 21 must multiply to 126
could be implied from a factor tree or division ladder
A1: could be implied from a factor tree or division ladder
A1: any order, do not accept inclusion of 1’s