Page 36 - ACE YR IGCSE A TOP APPR' TO MATHS

125.5 3
7 = 12.55 km/l [3] ξ
15 × 2 A B
3
Powers and roots

1 (a) 2 –2 [2] [2]
(b) 2 × 2 ÷ 2 = 2 2 [2] 4
5
4
3
(c) 3 ÷ 3 × 3 = 3 14 [2] ξ A B
–4
6
4
(d) 5 8 = 5 –1 [2]
5 9
2 (a) A [2]
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(b) E [2] C [2]
(c) B and C [2]
3 [7 + (–1)] – [(–4) ÷ 4] 121 5 ξ
= 6 – (–1) A B
121
= 6 – (–1)
= 7 [3]
4 2 × 2 = 2 0 C
–9
2a
–9 + 2a = 0 [2]
a = 4.5 [3] 6
2 1 ξ A B
2 3 + 3 3
3 ×
3 ×
5 1
2
2
(2 × 7 ) 2
2
= 2 + 3 C
2 × 7 [2]
= 1 [4] 7 (A ∪ B)’ ∩ C [3]
2
1 1 1 8 A’ ∩ B ∪ C [3]
6 (5 2 – 17 1 3) 3
3 ×
4 ×
= (25 – 17) 3 9 A ∪ B ∪ C’ [3]
= 2 [3]
7 169 – √100
1A
= 159 1 1 –1 [3] 1B Numbers
8 ( ( (2 ) ) 2 ) 54
8 2
= 1 [3] 1 (a) Time = 72 = 0.75 h = 45 min [1]
4 (b) Time = 54 = 3 h = 36 min
9 16 – 9 × 8 90 5
27 8 45 – 36 × 100% = 20% [2]
= 7 [3] 45
27 2 (a) Amount received
= (2000 × 1.85) × 0.99
Sets
= $3663 [2]
1 ξ (b) (i) Amount received
A B = (2000 × 0.005 × 6) + 2000 [2]
= $2060
(ii) Amount received
= (2060 × 1.8) − $30
= $3678 [2]
[2] (c) Danny, by $15 more [1]
(d) $500 ÷ $1.94
2 ξ = £257.73
A B = £258 [2]
3 (a) (i) $10000 × 0.3
= $3000
A : B : C
2.1 : 1.5 : 3.6
[2] 7 : 5 : 12

Cambridge IGCSE
TM
156 Ace Your Mathematics

Answers.indd 156 15/03/2022 11:08 AM