Ans for Practice Paper 9

Dear all, Hope you have done the two practice papers. Practice Paper 9 No Answer 1. 4 2. 2 3. 2 4. 3 5. 2 6. 4 7. 3 8. 4 9. 4 10. 1 11. 4 12. 3 13. 1 14. 2 15. 1 16 365 17 0.56 18 (7n – 12) kg 19 2/3 20 $30 21 7 marbles 22 20 cm 23 (49 pi – 98)cm2 24 1/2 25 6 cm 26 116 27 1/2 x 50 = 25 60 – 50 = 10 25 ÷ 10 = 2.5 2.5h after 0845 is 1115. 28 60 x 4 = 240 1/3x 240 = 80 24/80 x 100% = 30% 29 20% ---- 360 100% ---- 1800 30% ----- 1800 100% ----- 6000 30 90o – 30o = 60o Since, triangle ABC is an equilateral triangle. BC = 20 cm 31 540 – (68 + 73) = 399 399 ÷ 5 = 79 R 4 32 6 x y = 6y 33 10 packets of fries ------ 4 pies 10 – 5 = 5 (left) 5 packets ------ 2 pies 5 – 2 = 3 3 pies ----- $10.50 1 pie ------ $3.50 4 pies ------ $14 34 7 units ---- 150 – 45 = 105 1 unit ---- 105 ÷ 7 = 15 35 18 +12 = 30 1u = 30 2u = 60 36 15 units – 10 units = 5 units 5 units ------ 25 or 25 ÷ 5 = 5 1 unit ------ 5 11 units ------ 55 37 0.65 x 2700 = 1755 0.07 x 1755 = 122.85 (a) $122.85 (b) 1.07 x 1755 = 1877.85 Or 1755 + 122.85 = 1877.85 (b) $1877.85 38 1h ------ 15 km 4h ------ 60 km 3u = 60 km + 360 km = 420 km 1u = 140 km 2u = 280 km 280 ÷ 4 = 70 Ans: 70 km/h 39 (a) 1 : 1 [Common base (AE) and height (CD)] (b) 24u = 12 cm 11u = 5.5 cm 40 C : G 7 : 3 = 28 : 12 C : G 6 : 4 = 18 : 12 40u = 480 or 480 ÷ 40 = 12 1u = 12 10u = 120 or 12 x 10 = 120 Or 30% x 480 = 144 70% x 480 = 336 40% ------- 144 10% ------- 36 60% ------- 216 336 – 216 = 120 41. 5 x 3 = 15 15 + 9 = 24 2u ------ 24 1u ----- 24 ÷ 2 = 12 6u ----- 12 x 6 = 72 72 + 5 = 77 42 450 – 208 = 242 3S + 1A = 242 – (1) 5S + 4A = 450 – (2) (1) x 4, 12S + 4A = 968 – (3) (3) – (2), 7S = 518 1S = 518 ÷ 7 = 74 5S = 74 x 5 = 370 43. 40 44. 8 : 37 45a. 5cm 45b. 468.69 cm2 46a. 36 46b. 77 47a. 8 47b. 28 48a. 16 48b. 576