| Exam Board | Edexcel |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Session | Specimen |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Indices and Surds |
| Type | Expand and simplify surd expressions |
| Difficulty | Easy -1.3 This is a straightforward C1 question testing basic surd manipulation. Part (a) requires simple factorization of 80 and extracting square roots. Part (b) involves expanding a binomial with a surd, which is routine practice requiring only careful arithmetic. Both parts are standard textbook exercises with no problem-solving element, making this easier than average. |
| Spec | 1.02b Surds: manipulation and rationalising denominators |
\begin{enumerate}[label=(\alph*)]
\item Express $\sqrt{80}$ in the form $a\sqrt{5}$, where $a$ is an integer. [1]
\item Express $(4 - \sqrt{5})^2$ in the form $b + c\sqrt{5}$, where $b$ and $c$ are integers. [3]
\end{enumerate}
\hfill \mbox{\textit{Edexcel C1 Q3 [4]}}