Use this ZIMSEC O-Level Mathematics Paper 2 November 2020 marking scheme for checking answers, revision, and exam preparation in Zimbabwe.
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Questions: ZIMSEC O-Level Mathematics Paper 2 November 2020 Question Paper
This is the ZIMSEC O-Level Mathematics marking scheme for Paper 2 from November 2020. It shows how marks are awarded, so you can mark your own answers to the matching question paper. The paper code is 4004/2. See the question paper.
Trotter X Casemiro
N2020/2
$4004 / 2$
(a) $20-20 \div 5+3 \times 2$
\[
\begin{array}{c}
20-4+6
26-4
22
\end{array}
\]
(b)
\[
\begin{aligned}
(\sqrt{10}-\sqrt{5})^{2} | =(\sqrt{10}-\sqrt{5})(\sqrt{10}-\sqrt{5}) | =\sqrt{10}(\sqrt{10}-\sqrt{5})-\sqrt{5}(\sqrt{10}-\sqrt{5}) | =10-\sqrt{50}-\sqrt{50}+5 | =15-2 \sqrt{50} | =15-2 \sqrt{25} \times \sqrt{2} | =15-2 \times 5 \sqrt{2} | =15-10 \sqrt{2}
\end{aligned}
\]
(c)
\[
\begin{aligned}
15 | =5 \times 3
20 | =2 \times 2 \times 5 \quad \| 2^{2} \times 5
25 | =5^{2}
\end{aligned}
\]
\[
\begin{aligned}
\therefore \angle C M | =5^{2} \times 2^{2} \times 3 | =25 \times 4 \times 3 | =300
\end{aligned}
\]
(d)
\[
\text { (i) } \begin{array}{r|r}
2 | 252
2 | 126
3 | 63
3 | 21
7 | 7
\end{array}
\]
\[
\therefore 252=2^{2} \times 3^{2} \times 7
\]
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