| Exam Board | Edexcel |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Marks | 3 |
| Paper | Download PDF ↗ |
| Topic | Indices and Surds |
| Type | Evaluate numerical powers |
| Difficulty | Easy -1.8 This is a straightforward recall question testing basic index laws with no problem-solving required. Part (a) is trivial (reciprocal of 16), and part (b) requires only one additional step (square root then reciprocal). Both are standard textbook exercises requiring minimal calculation. |
| Spec | 1.02a Indices: laws of indices for rational exponents |
\begin{enumerate}[label=(\alph*)]
\item Write down the value of $16^{-1}$. [1]
\item Find the value of $16^{-\frac{1}{2}}$. [2]
\end{enumerate}
\hfill \mbox{\textit{Edexcel C1 Q1 [3]}}