1MA0 Foundation March 2013 Paper 1 Q15
15 Here is a list of numbers.
1 2 4 5 7 11 13 14 15 17
From the list, write down three different prime numbers that add together to make 20 (3)
| Answer | Mark | Notes |
|---|---|---|
| 3 primes that total 20 | 3 | M1 for identifying at least 2 different prime numbers from the list, could indicate on the list (not more than one incorrect) M1 for any 3 numbers from the list that total 20 A1 for 2, 7, 11 or 2, 5, 13 or both (in any order) |