O-LevelMathematicsNumber4024/12 · May/June 2022 · Q143 Marks
Write these numbers in order of size, starting with the smallest. 2000 0.002 2×10⁻⁴ 2×10⁻²
- (a)Write these numbers in order of size, starting with the smallest. 2000 0.002 2×10⁻⁴ 2×10⁻²[1]
- (b)This is a calculation using numbers in standard form. a×10⁻⁷ × 5×10ᵇ = 4 × 10⁻¹⁶ Find the value of a and the value of b.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [1] (a) 2 × 10⁻⁴, 0.002, 2 × 10⁻², 2000
- [2] (b) [a =] 2 [b =] 8 B1 for each or SC1 for a = 20 and b = 9
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