Page 59 - ACE YR IGCSE A TOP APPR' TO MATHS

3 3 1 2 1 2
(b) × = [2] (b) (i) × = [2]
6 6 4 5 3 15
+
(c) 1 + 4, 4 + 1, 2 + 3, 3 + 2 (ii) ( 3 × 1 ) ( 2 × 2 )
1 1 1 1 2 1 1 2 5 4 5 3
× + × + × + × 5
6 6 6 6 6 6 6 6 = 12 [3]
= 1 + 1 + 2 + 2 12 11 66
36 36 36 36 7 (a) (i) 26 × 25 = 325 [2]
= 1 [3] 14 12 12 14
6 (ii) ( × ) ( × )
+
3 (a) 0.3 × 0.3 + 0.5 × 0.5 + 0.2 × 0.2 26 25 26 25
= 0.38 [2] = 168 [2]
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(b) 1 – 0.38 325
= 0.62 [1] (b) (i) ( 14 × 13 × 12 ) ( 12 × 11 × 10 )
+
(c) 0.3 × 0.2 + 0.2 × 0.3 26 25 24 26 25 24
= 0.12 [2] = 2184 + 1320
4 (a) 0.15 × 0.85 = 0.1275 [2] 15600 15600
(b) 0.15 × 0.15 × 0.85 = 0.019 [2] 73
= [3]
5 (a) First ball Second ball 12 325 11 14 14 12 11
+
3 (ii) ( 26 × 25 × 24 ) ( 26 × 25 × 24 ) +
9 White 12 14 11
( 26 × 25 × 24 )

4 6 Black = 231 [4]
10 White 9 650
8 (a) 2 × 2 × 2 = 8 [2]
15 15 15 3375
6 2 2 2 8
10 Black 4 White (b) (i) 3 × 3 × 3 = 27 [2]
9 2 1 2 1 1 1
(ii) ( 3 × 5 × 15 ) × 6 + ( 5 × 5 × 5 )
43
5 Black = 375 [3]
9 [3] 9 (a) 2 [1]
( 4 3 ) ( 6 5 ) 7
(b) (i) 10 × 9 + 10 × 9 (b) (i) 1 [1]

= 2 + 1 6 1
2
15 3 (ii) 6 = 3 [1]
= 7 [2] (c)
15 1
(ii) 1 – 7 6 Daniel stands
15 next to Harry
8
= [2] Harry
6. (a) 15 stands at 5 Daniel does not
1 2 an end 6 stand next to
4 Buy her breakfast 7 Harry
circle

3 Bus 3 Do not buy her 5 Harry
does not
5 4 breakfast 7 stand at 2 Daniel stands
an end 6 next to Harry
2 circle
5 Walk 2 4 Daniel does
3 Buy her breakfast 6 not stand next
to Harry
1 Do not buy her [3]
3 breakfast
[3]

Answers 179

Answers.indd 179 15/03/2022 11:08 AM