| Exam Board | OCR MEI |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | 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 (i) requires recognizing cube roots and part (ii) requires knowing negative exponents flip fractions—both are fundamental C1 skills with minimal computational steps. This is easier than the calibration example at -1.5 as it's even more direct. |
| Spec | 1.02a Indices: laws of indices for rational exponents |
| Answer | Marks |
|---|---|
| 11 | (ii)) |
| Answer | Marks |
|---|---|
| 49 | 2 |
| 2 | M1 for 25 1 2 = 25soi or for 253 |
| Answer | Marks |
|---|---|
| a | 4 |
Question 11:
11 | (ii))
9
(ii) as final answer
49 | 2
2 | M1 for 25 1 2 = 25soi or for 253
1
M1 for a−1 = soi eg by 3/7 or 3/49
a | 4Find the value of each of the following, giving each answer as an integer or fraction as appropriate.
\begin{enumerate}[label=(\roman*)]
\item $8^{\frac{1}{3}}$ [2]
\item $\left(\frac{7}{3}\right)^{-2}$ [2]
\end{enumerate}
\hfill \mbox{\textit{OCR MEI C1 Q11 [4]}}