Posted in O-Level Math

Suggested answers to GCE O Level 2015 Math (4016) Paper 1 (via crowdanswering)

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Ok. Some people have sent me some answers. Here they are. Good luck.

1.  -30

2.  $966

3.  4,4,5,10,12

  1. 119

5.  (61x – 18) / 12

  1. (a) {4, 8}       (b)  shade outside the two ovals

7.  (4x-3y)(a-2b)

8.(a)  B(2,-2)     (b)  6.71 units

9.  Mean = 162 g;  SD = 5.48 g

  1. $32680

  2. 45 deg, 27 deg, 108 deg

12 (ai) 1.5 L   (ii) 4.5 L    (b)  6:15:20

13.   5 hrs  52 min

14.  (a)  2 x 3^2 x 5^2    (b)    90,  75

15.  (a)  3 < x <= 8.5      (b)   4, 5, 6, 7 , 8

16.  216 deg

17 (a)  28.6 cm    (b)   1.37

18.  141.9 deg

19.  716 cm squared

20 (a)  (shown) [whatever that means]   (b)  (16, -5)   (c)  160 sqr units

21 (a)  q = (A-2(pi)p^2) / (pi)p   (b)  3r

22(a)  P=(1st row 4  2  3; 2nd row 3  0  4)    (b)  R = (1st row  15   -0.3;  2nd row  10.1   0.2)

22(c)   $0.20    (d)   $13.23

23 (a) I don’t have to show you   (b)  3(pi)r2

24(a)  (10-n)/10   (b)  (90-19n+n^2)/90

24(c)(I)  show it yourself   (ii)  3

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