4MA0 Foundation June 2016 Paper 1R Q7
7 Here are the first five terms of a number sequence.
18 22 26 30 34
(a) Write down the next two terms of the sequence. (2)
(b) Explain how you found your terms. (1)
(c) Work out the 20th term of the sequence. (2)
| Scheme | Marks |
|---|---|
| 38, 42 | B2 |
| (2) |
Notes
B2: B1 for 1 correct
Allow ft, eg 37, 41
NB: B0 for 36, 38, etc
| Scheme | Marks |
|---|---|
| Add 4 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| 18 + 19 × 4 or 14 + 20 × 4 or \(4n + 14\) or 18, 22, 26, 30, ........, 90, 94 | M1 |
| 94 | A1 |
| (2) |
Notes
M1: Allow 18 + 20 × 4 or 90 or 98
List should show a clear intention of adding 4 with at least 5 terms (can count 42 as one of the 5 terms but not 18, 22, 26, 30, 34, 38).
Condone 1 arithmetic error.