4MA0 Foundation June 2012 Paper 2 Q23
23 Express 300 as a product of its prime factors.
(3)
| Scheme | Marks |
|---|---|
| A product of 3 or more factors of 300 of which at least 2 are different primes (i.e. from 2, 3 or 5) | M1 |
| All 5 correct prime factors & no extras (ignore 1’s) 2, 2, 3, 5, 5 (with/without 1’s) or \(2^2 \times 3 \times 5^2 \times 1\) or \(2^2 + 3 + 5^2\) | M1 |
| 2 × 2 × 3 × 5 × 5 | A1 |
| (3) | |
| (Total 3 marks) |
Notes
M1: e.g 2 × 3 × 50 (must multiply to 300)
could be implied from a factor tree or division ladder
M1: could be implied from a factor tree or division ladder
A1: any order, do not accept inclusion of 1’s
accept . in place of ×