Foundation November 2020 Paper 2 Q6
6 Here are the first five terms of a number sequence.
3 7 11 15 19
(a) Write down the next term of the sequence. (1)
(b) Explain how you worked out your answer. (1)
(c) Find the first number greater than 70 that is in the sequence. (2)
Ada says,
“96 is a number in the sequence”
(d) Is Ada correct?
You must give a reason for your answer. (1)
You must give a reason for your answer. (1)
| Scheme | Marks |
|---|---|
| 23 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| Added 4 | B1 |
| (1) |
Notes
B1: accept +4, 4 more, oe, \(4n - 1\) (need to know 4 and we need to add/go up oe)
| Scheme | Marks |
|---|---|
| (23) 27, 31, 35, 39, 43, 47, 51, 55, 59, 63, 67, 71 OR \(4n - 1 = 70\) | M1 |
| 71 | A1 |
| (2) |
Notes
M1: allow list of numbers going up in 4’s up to 71 or more (allow one error)
| Scheme | Marks |
|---|---|
| Working required No and identifying all terms in sequence are odd OR No and method to count on as far as 95 (or clearly showing 95) OR No and method to find \(n\) when term is 96 e.g. solving \(4n - 1 = 96\) Answer: No with reason | B1 |
| (1) | |
| (5 marks) |
Notes
B1: must have ‘No’ oe or ‘is not’ oe and a reason.