數學試卷答案 – St. Stephen’s Girls’ College Form 1 Math Mid-Year Exam 2017-18

數學試卷答案 – St. Stephen’s Girls’ College Form 1 Math Mid-Year Exam 2017-18

試卷答案

Section A

1. -2
2. \(-3.5, -1\frac{1}{3},+3\frac{1}{5},+4.1\)
3. 0
4. \(\dfrac{c}{2}-(a+b)^{2}\)
5. a) 3
   b) -12
6. -3
7. 2a + 6ab
8. $5.5
9. 72 kg
10. 22
11. -217
12. B
13. $104
14. a) 8 + m ≤ 20
    b) 4² – a < – 8   or   16 – a < -8
15. a) ∠NJL or ∠JNL or ∠JLM
    b) ∠KJN or ∠HNL ∠ NLJ
16. B
17. Obtuse-angled triangle
18. 300
19. 24
20. 37.5%
21. $250
22. $75
23. 410 kg

Section B

25. a) 50
    b) 41
    c) -9
26. a) 2(x + y) ≤ 50
    b) cannot
    c) 12 cm and 13 cm
        or any 2 lengths which is > 11cm but ≤ 14cm
27. $130
28. x = 30°,  y = 33°
29. x = 9
30. a) 49.5 kg
    b) No
31. a) $80
    b) $600

St. Stephen’s Girls’ College Form 1 Math Mid-Year Exam 2017-18 試卷