O-LevelMathematicsNumber4024/23 · May/June 2025 · Q133 Marks
Write 1.23 × 10⁻⁴ as an ordinary number.
- (a)Write 1.23 × 10⁻⁴ as an ordinary number.[1]
- (b)(8.2 × 10⁴) + (x × 10ʸ) = 9.1 × 10⁵. Find the value of x and the value of y.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.
- [1] 0.000123 cao
- [2] [x = ] 8.28
- [y = ] 5
- B1 for each
- or for 828000 or 8.28 × 10⁵ seen
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