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Suggested answers to GCE O Level 2015 A. Math (4047) Paper 1

I’m just getting ready. Please paste your suggested answers here when the time comes and let others comment on it.  Thank you.

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Suggested answers to GCE O Level 2015 Math (4016) Paper 2 (via crowdanswering)

Ok. Here are some of the answers:

1(a)  (3x-4y)(3x+4y)

1b(I)  5y^2/9x     (ii)    (4x+15)/(x+2)(2x-3)

(c)  5 or -1/2

(d)(I)  (x-9/2)^2 – 13/4   (ii)  6.30 , 2.70

to be continued ….

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O-LEVEL 2015 PHYSICS MCQ INTENSIVE DRILL SESSION (500+ MCQs)

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Posted in Exam Answers, Pure Chemistry

Suggested answers to GCE O Level 2014 Chemistry (5073) Paper 1

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O-LEVEL CHEMISTRY PRACTICAL TRAINING

CHEMISTRY TUITION (WITH PRACTICALS)

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Here are the suggested answers for O Level Chemistry Paper 1, worked out by our O-Level Chemistry Tutor Mr Eric Lee (Mr Lee is also our H2 Chemistry tutor). Detailed explanations will be posted soon. Answers for paper 2 will be posted soon too.

1. B
2. A
3. A (corrected)
4. B
5. A
6. A
7. C
8. D
9. D
10. B
11. C
12. D
13. B
14. A
15. D
16. A
17. B
18. C
19. C
20. C
21. C
22. D
23. C
24. D
25. C
26. A
27. B
28. C
29. A
30. C
31. B
32. B
33. B
34. B
35. D
36. B
37. C
38. B
39. D
40. D

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Posted in Exam Answers

Suggested answers to GCE O Level 2014 Math (4016) Paper 2

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1(a) x < 1/2

1(b)(i) W = 126

1(b)(ii) u = +- Sqrt(v^2 – 2W/m)

1(c)  2x / (x – 4y)

1(d) x = 7 or -1

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2(a) 4.12 x 10^10 kWh

2(b) 40.5% (to 3 SF)

2(c) 1439 kWh (to the nearest kWh)

2(d) 26.2% (to 3 SF)

2(e) 5725 GWh (to the nearest GWh)

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3(a) p = 11.4

3(b) cubic graph

3(c) Near exact answers are x = -1.54, 3.84 or 1.69 (examiners accept answers within a small range)

3(d) Exact answer for the gradient is -5.2 (examiners accept answers within a small range).

3(e) (i) straight line with positive gradient intersects the curve at one point.

3(e)(ii) Near exact answer is (4.24, 0.83) (examiners accept answers within a small range)

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4(a) 83 deg

4(b) Use AA property

4(c) Triangle EAB

4(d)(I) 5:3

4(d)(ii) 82.62 cm squared

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5(a)(I) (-6, -7) in vertical form (2×1 matrix)

5(a)(ii) 9.22 units

5(a)(iii) (4, 8.5)

5(b)(I) 4y + 3x = 16

5(b)(ii) (-2, 5.5)

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To be continued …….