4MA0 Foundation June 2017 Paper 1R Q15
15
(a) Write down a prime number between 14 and 20 (1)
(b) Find the two prime numbers that have a sum of 25 (1)
(c) Find the two numbers that have a sum of 60 and a difference of 2 (2)
| Scheme | Marks |
|---|---|
| 17 or 19 | B1 |
| (1) |
Notes
B1: for either or both
| Scheme | Marks |
|---|---|
| 2, 23 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| (60 − 2) ÷ 2 | M1 |
| 29, 31 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: any complete method