2009 Rv Em P1 Solutions

2009 RVHS Prelim Maths (4016) Paper 1 Answer Key 1(a) 3.17 x 10-1, (b) 4.21 x 109 2(a) x = 60, (b) 40 children 3(a)

8x3 1 , (b) k = 4 27 2

4(a) 0938, (b) 1509 2 7

5(a) $160, (b) 14 % 6. 44 cm 7(a)

2 , (b) 4.0 x 106 3

8(a) c = 1, (b) m =

1 2

9 40 , (ii)  40 41

9(b)(i)

 6.6 

10(a)   , (b) It means that the cost of package A is $6.60 while that of B is $14.10  14.1 11(b) 4 3r 4r 800 1 13(a) y  , (b) 33 % x 3

12. T 

14(a)7, (b) 2, (c) 40% 15(a) ( p  2q)(3x  4 y ) , (b) 24x 16(a) 18 sides, (b) 9 sides 17(a) 12:45 pm, (b) 480 = 25 x 3 x 5, 576 = 26 x 32, n = 6 18(a) k =4, (b) x = 3, y = 1 19(a) 2:3, (b) 202.5 cm2, (c) $45  2  20(a)(i)2n, (ii) 4n, (iii) 4(m  n), (b) 2(2m + n), UV = SU . 5

3 4

21(a)(ii) x = 1 ,

(b)(ii) (3, 1)

3 2

22(a) v  x , (b) 30 s, (c) 675 m 23(b) 082, (c) 12400 m2