1MA0 Foundation November 2015 Paper 2 Q7
7 Here is a sequence of patterns made from triangles and circles.
(a) Complete the diagram below to show pattern number 4 (1)
(b) Find the number of circles in pattern number 7 (2)
Jane says pattern number 17 has 36 circles.
Jane is wrong.
(c) Explain why. (1)
| Answer | Mark | Notes |
|---|---|---|
| Diagram | 1 | B1 cao |
| Answer | Mark | Notes |
|---|---|---|
| 15 | 2 | M1 sequence written out and continued or diagram drawn or \(2n + 1\) given as the \(n\)th term A1 cao |
| Answer | Mark | Notes |
|---|---|---|
| Explanation | 1 | B1 explanation eg answer must be odd or use of \(2n + 1\) or pattern 17 has 35 circles |