1MA0 Foundation June 2015 Paper 2 Q13
13 Here are the first four terms of a number sequence.
3 7 11 15
(a)
(i) Write down the next term in the sequence.
(ii) Explain how you got your answer. (2)
(b) Work out the 11th term in the sequence. (1)
(c) Is 79 a term in this sequence?
Explain how you got your answer. (1)
Explain how you got your answer. (1)
| Answer | Mark | Notes |
|---|---|---|
| (i) 19 | 2 | B1 cao |
| (ii) Reason | B1 explanation, e.g. add 4 each time |
| Answer | Mark | Notes |
|---|---|---|
| 43 | 1 | B1 cao |
| Answer | Mark | Notes |
|---|---|---|
| Yes with reason | 1 | B1 reason eg 1 less than 80 and 80 is a multiple of 4, or generate series to 79, or 79 is the 20th term, oe |