數學試卷答案 – St. Stephen’s Girls’ College Form 3 Math Mid-Year Exam 2015-16

數學試卷答案 – St. Stephen’s Girls’ College Form 3 Math Mid-Year Exam 2015-16

試卷答案

Section A

1. Mean: 1.5, Median: 1.5, Mode(s): 1, 2
2. 169.5 s
3. a) \(1.47 \times 10^{7}\)
   b) \(1.025 \times 10^{-4}\)
4. a) >
   b) -2(4x – y)²
5. 3(2x + 3y)(2x – 3y)
6. -2(4x – y)²
7. 100100100111₂
8. 45₁₆
9. $4179
10. 92800
11. $374400
12. $20200
13. D, E
14. 2/5
15. 19/25
16. 13.0 cm²
17. x^{n – 1}(3x – 4)(x + 3)

Section B

18. x⁵/y⁸
19. -2
20. 9
21. a) 1.75xy cm²
    b) 4-
22. a) \(2.2 \times 10^{8}\)
    b) \(2.42 \times 10^{-5}\)g
23. a) $2.4
    b) loss
24. 9/8
25. a) 78
    b) David
26. a) $216000 – x
    b) $233280 – 2.08x
    c) $112154
27. a) 1.51 m
    b) 59.1 m²
28. a) (x – 4)(x² + 4x + 16)
    b) (x – 20)(x – 4)
    c) (x – 4)(3x + 2)(x + 4)
29. a) \(2\sqrt{2}\) m
    b) 0.137

St. Stephen’s Girls’ College Form 3 Math Mid-Year Exam 2015-16 試卷