| Exam Board | Edexcel |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Year | 2007 |
| Session | June |
| Marks | 6 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Arithmetic Sequences and Series |
| Type | Sum of first n terms |
| Difficulty | Moderate -0.8 This is a straightforward application of standard arithmetic sequence formulas (nth term and sum) with clearly stated parameters. The context is simple, requiring only substitution into well-rehearsed formulas with no problem-solving insight needed, making it easier than average but not trivial since it involves two-part calculation with moderately large numbers. |
| Spec | 1.04h Arithmetic sequences: nth term and sum formulae |
A girl saves money over a period of 200 weeks. She saves 5 p in Week 1,7 p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence.
\begin{enumerate}[label=(\alph*)]
\item Find the amount she saves in Week 200.
\item Calculate her total savings over the complete 200 week period.
\end{enumerate}
\hfill \mbox{\textit{Edexcel C1 2007 Q4 [6]}}