MARKING SCHEME FOR JSS1 MATHEMATICS FIRST TERM CAT 2
SECTION A: OBJECTIVE TEST
ALLOCATION OF MARKS: ¼ mark each = 5 marks
SECTION B: ESSAY
ALLOCATION OF MARKS: 10 ÷ 2 = 5 marks
1. (a) \(\begin{array}{c|c c} 2 & 24 \\ \hline 2 & 6 \text{ R } 0 & ↑\\ \hline 2 & 3 \text{ R } 0 & |\\ \hline 2 & 1 \text{ R } 0 & |\\ \hline & 0 \text{ R } 1 & |\end{array}\) (1 mark)
\(= 11000_2\) (1 mark)
1. (b) Rope length \(= 200\) meters
\(35\%\) of \(200m\)
\(\frac{35}{100} × \frac{200}{1}\) (1 mark)
\(= 35 × 2\)
\(= 70m\) (cut off) (1 mark)
The length of remaining
\(= 200m -70m = 130m\) (1 mark)
TOTAL = 5 MARKS
2. (a) \(6\frac{3}{4} + 1\frac{1}{2} -2\frac{1}{4}\)
\(\frac{5 \text{ } \text{ } 3 + 2 -1}{4}\) (½ mark)
\(\frac{5 \text{ } \text{ } 5 -1}{4}\) (½ mark)
\(\frac{5 + 4}{4} = 5 + 1\) (1 mark)
\(=6\) (1 mark)
OR
2.
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