4MA0 Foundation January 2012 Paper 2 Q4
4 Here are the first five terms of a number sequence.
50 47 44 41 38
(a) Write down the next two terms of the sequence. (2)
(b) Explain how you worked out your answer. (1)
(c) Find the 15th term of the sequence. (1)
(d) Explain why 0 cannot be a term of the sequence. (1)
| Scheme | Marks |
|---|---|
| 35 32 | B2 |
| (2) |
Notes
B2: B1 for each number
| Scheme | Marks |
|---|---|
| eg took away 3, subtracted 3, 3 less | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| 8 | B1 |
| (1) |
Notes
B1: cao
| Scheme | Marks |
|---|---|
| eg 50 is not a multiple of 3, 3 is not a factor of 50, 2 is in the sequence, −1 is in the sequence | B1 |
| (1) | |
| (Total 5 marks) |