OCR MEI C1 — Question 1 4 marks

Exam BoardOCR MEI
ModuleC1 (Core Mathematics 1)
Marks4
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Mark schemeDownload PDF ↗
TopicIndices and Surds
TypeEvaluate numerical powers
DifficultyEasy -1.3 This is a straightforward recall question testing basic index laws (zero and negative fractional powers). Part (i) is trivial, and part (ii) requires only direct application of rules with no problem-solving. Simpler than average A-level questions due to minimal steps and no conceptual challenge.
Spec1.02a Indices: laws of indices for rational exponents
Evaluate the following.
  1. \(200^0\) [1]
  2. \(\left(\frac{25}{9}\right)^{-\frac{1}{2}}\) [3]
Question 1:
AnswerMarks Guidance
1(i) 1
[1]
AnswerMarks Guidance
1(ii) 3
or 0.6
AnswerMarks
53
[3]allow B3 for ±0.6 oe;
1 1
25 2  9 2 1
M1 for      soi or
 9  25 1
252
 
 9 
AnswerMarks
and M1 for at least one of 3 and 5 foundM1 for inversion even if they have
done something else first, eg
may be earned after 2nd M1 for
5
inversion of their
3
Question 1:
1 | (i) | 1 | 1
[1]
1 | (ii) | 3
or 0.6
5 | 3
[3] | allow B3 for ±0.6 oe;
1 1

25 2  9 2 1
M1 for      soi or
 9  25 1
252
 
 9 
and M1 for at least one of 3 and 5 found | M1 for inversion even if they have
done something else first, eg
may be earned after 2nd M1 for
5
inversion of their
3
Evaluate the following.

\begin{enumerate}[label=(\roman*)]
\item $200^0$ [1]
\item $\left(\frac{25}{9}\right)^{-\frac{1}{2}}$ [3]
\end{enumerate}

\hfill \mbox{\textit{OCR MEI C1  Q1 [4]}}
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Q1 4 Q2 5 Q3 4 Q4 5 Q5 4 Q6 4 Q7 5 Q8 5 Q9 3 Q10 5 Q11 4