O-LevelMathematicsNumber4024/21 · Oct/Nov 2025 · Q123 Marks
Write 0.0142 in standard form.
- (a)Write 0.0142 in standard form.[1]
- (b)The numbers in the calculation are written in standard form. (3.2 × 10⁻⁴) × (x × 10ʸ) = 2.6 × 10³ Find the value of x and the value of y.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.
- 12(a) 1.42 × 10⁻² cao [1]
- 12(b) [x = ] 8.125 oe [y = ] 6 [2] M1 for 2.6 × 10³ / 3.2 × 10⁻⁴ soi
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