Foundation June 2022 Paper 3 Q3
3 Here are the first four dot patterns in a sequence.
(a) Draw Pattern 5 in the sequence. [1]
(b) Without drawing, work out how many dots are in Pattern 8 of the sequence.
Explain how you worked out your answer. [2]
Explain how you worked out your answer. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
Correct pattern of 9 dots: | 1 | May be at the end of the sequence | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 15 Add 2 [each time] or goes up in 2s oe or \(2n - 1\) oe or correct calculation leading to 15 using 7, 8, or values from given terms e.g. \(7 + 8\) or \(2 \times 7 + 1\) or 8 [dots] and 7 [dots] or [1, 3, 5, 7, 9] 11, 13, 15 | 1 1 | Ignore a drawing Do not accept “odd numbers” but accept “the eighth odd number” oe Mark the best part if no contradiction \(8 + 7\) may be 8 on left, one less on right 2 times previous pattern number + 1 oe | |