Foundation June 2019 Paper 1 Q4
4 Here are the first four terms of a sequence.
\[3 \qquad 8 \qquad 13 \qquad 18\](a)
(i) Write down the next term of the sequence. [1]
(ii) Explain how you worked out your answer. [1]
(b) Explain why 534 is not a term in this sequence. [1]
| Answer | Marks | Part marks and guidance |
|---|---|---|
| (i) 23 | 1 | |
| (ii) Add 5 | 1 | Need direction and quantity May be on diagram See appendix |
Appendix
Exemplar responses for Q4(a)(ii)
| Response | Mark |
|---|---|
| 18 + 5 | 1 |
| \(5n - 2\) | 1 |
| jump each time is 5 and the number before the sequence = –2, check for +5 on diagram, if there award mark | 1 |
| the difference is 5, check for +5 on diagram, if there award mark | 1 |
| \(5n\) | 0 |
| the difference is 5 | 0 |
| jump each time is 5 and the number before the sequence = –2 | 0 |
| Its going up in 5’s but take away 2 | 0 |
| 5 | 0 |
| \(n + 5\) | 0 |
| Answer | Marks | Part marks and guidance |
|---|---|---|
| The terms in the sequence end with 3 or 8 | 1 | See appendix |
Appendix
Exemplar responses for Q4(b)
| Response | Mark |
|---|---|
| The number only ends in 3 or 8 there is a pattern | 1 |
| When you carry on the number would be 533 not 534 | 1 |
| Its not in the sequence as there would never be a 4 as a unit | 1 |
| The terms don’t end in 4 | 1 |
| [\(n =\)] 107.2 is not a whole number | 1 |
| [\(n =\)] 107.2 | 1 bod |
| Because it hasn’t got 8 or 3 in the number | 0 |
| Because you can’t add 5 to get to 534 | 0 |
| 534 is an even number | 0 |
| Doesn’t fit the pattern | 0 |