Use this ZIMSEC O-Level Mathematics Paper 2 2021 marking scheme for checking answers, revision, and exam preparation in Zimbabwe.
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This is the ZIMSEC O-Level Mathematics marking scheme for Paper 2 from 2021. It shows how marks are awarded, so you can mark your own answers.
1
\multirow[b]{2}{*}{(b)(i)} | \multirow{2}{*}{
$(\hat{A D E}=)(\hat{A C E}=\prime \hat{A B E})$
B|B|
} | & Mark Additional guidance
| & | (2) ACE and ABE condome micsing BI and Bobun capú $\mathrm{B}_{2} \mathrm{~B}_{4}$ сесь еряя
| $\widehat{B E C}=37^{\circ}$ | withent $\Phi$ | $(B E C=) \begin{array}{l}90-53 \text { or equiv } M / 180-(90+53)\end{array}$
(ii) | & |
BH
Anw; no penalty $37^{\prime}$ Al
| $(B \hat{A} E=) 127^{\circ}$ | [H | equiv (GAE) $=127 \quad \mathrm{BI} 127^{\circ}$ BI
(iii) | & | ** Anw: no penalty
| $(D \hat{O} C=) 84^{\circ}$ | [2] | 2 (their $\left(90^{\circ}-48^{\circ}\right)$ ) or MI equiv M1 $84^{\circ}$ AI
Anw: No penally
2
(a)(i)
Mark Addmional guidance
(a)(ii)
\[
(V=) 165 \quad \begin{array}{l}
\text { Marking Guidance }
7
{ }_{165}^{3} \times \frac{22}{7} \times 9 \times \frac{3^{2}}{2} / 2 \frac{5}{2}
\text { Anw: } 1
\end{array}
\]
M1
Al
A1
\[
r=\sqrt{\frac{3 V}{7 h \pi}}
\]
\[
\begin{array}{l}
r^{2}=\frac{3 V}{7 h \pi} \text { or equiv }
r=\sqrt{\frac{3 V}{7 h \pi}} \quad \text { Al }
\end{array}
\]
MI
M1
Al
Anw: no penalty
(b)(i)
\[
(A B)=)\binom{7}{-6}
\]
[2] B 2 B 2
-1 each error missing brackets a use of
(b)(ii)
B3 -1 each error -1 each error
SC : After ${ }^{\beta} 0$ award SCB1 for $\frac{1}{\text { their } \operatorname{det}}\left(\begin{array}{ll}3 | 2 6 | 5\end{array}\right)$ or $\begin{array}{c}\text { shds } \text { met } \bar{e} \text { correct }\end{array}$ in - not be
\[
\left(A^{-1}\right)=\frac{1}{3}\left(\begin{array}{ll}
3 | 2
6 | 5
\end{array}\right) \text { B3 } \frac{1}{3}\left(\begin{array}{ll}
a | b
c | d
\end{array}\right) \text { where } a, b, c \text { and } d \text { are }
\]
elements of $A$ even with all signs changed.
Anw: no penalty
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