Chapter 14: Answers to Revision Exercise 14G 1 a 25 b 10 c 12 d 12 e 12 f 37 2 a 30 b 3 c 9 d 12 e 4 f 12 3 a 8 b 49 c 11 d 3 e 3 f 32 g 13 h 23 i 4 j 50 48 20 k l 4 a 4 × (3 + 7) = 40 b 10 ÷ (2 + 3) = 2 c 18 ÷ (3 + 3) = 3 d (5 2) × 4 = 12 e (20 5) × 2 = 30 f 5 × (12 8) = 20 – – – g (10 22) × 2 = 12 h 10 (22 × 2) = 2 i (20 42) × 5 = 20 – – – 5 a 30 b 22 c 21 d 12 e 7 f 81 Exercise 14H 1 Transaction Amount paid in Amount paid out Balance £64.37 Standing order £53.20 £11.17 Cheque £32.00 £43.17 Direct debit £65.50 –£22.33 Cash £20.00 –£2.33 Wages £124.80 £122.47 Loan £169.38 –£46.91 2 a 20 °C b 82 °C c 128 °C d 72 °C e 108 °C f 62 °C g 56 °C h 46 °C 3 a 8 b c d 8 e 7 –5 –13 f g h i 12 j –5 –6 –2 –2 k l m n 17 o 12 –9 –1 –10 p –16 4 a b c d 5 a b 4 c d e –2 –3 –2 –9 f 3 g h 4 i 7 –15 Exercise 14I 1 a 4, 8, 12, 16, 20 b 9, 18, 27, 36, 45 c 12, 24, 36, 48, 60 d 25, 50, 75, 100, 125 2 a 3, 15, 18, 24, 36, 39, 45, 48, 69, 90, 120 b 15, 45, 90, 120 c 8, 24, 36, 48, 64, 120 d 24, 36, 48, 120 3 a 48 b 48 c 45 d 45 4 a 2, 3, 5, 7, 11, 13, 17, 19 b prime numbers 5 a 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 b 1, 2, 4, 13, 26, 52
Chapter 14: Answers to Revision Exercise 14G 1 a 25 b 10 c 12 d 12 e 12 f 37 2 a 30 b 3 c 9 d 12 e 4 f 12 3 a 8 b 49 c 11 d 3 e 3 f 32 g 13 h 23 i 4 j 50 k 48 l 20 4 a 4 × (3 + 7) = 40 b 10 ÷ (2 + 3) = 2 c 18 ÷ (3 + 3) = 3 d (5 – 2) × 4 = 12 e (20 – 5) × 2 = 30 f 5 × (12 – 8) = 20 g (10 – 22) × 2 = 12 h 10 – (22 × 2) = 2 i (20 – 42) × 5 = 20 5 a 30 b 22 c 21 d 12 e 7 f 81 Exercise 14H 1 Transaction Amount paid in Amount paid out Balance £64.37 Standing order £53.20 £11.17 Cheque £32.00 £43.17 Direct debit £65.50 –£22.33 Cash £20.00 –£2.33 Wages £124.80 £122.47 Loan £169.38 –£46.91 2 a 20 °C b 82 °C c 128 °C d 72 °C e 108 °C f 62 °C g 56 °C h 46 °C 3 a 8 b –5 c –13 d 8 e 7 f –5 g –6 h –2 i 12 j –2 k –9 l –1 m –10 n 17 o 12 p –16 4 a b c d 5 a –2 b 4 c –3 d –2 e –9 f 3 g –15 h 4 i 7 Exercise 14I 1 a 4, 8, 12, 16, 20 b 9, 18, 27, 36, 45 c 12, 24, 36, 48, 60 d 25, 50, 75, 100, 125 2 a 3, 15, 18, 24, 36, 39, 45, 48, 69, 90, 120 b 15, 45, 90, 120 c 8, 24, 36, 48, 64, 120 d 24, 36, 48, 120 3 a 48 b 48 c 45 d 45 4 a 2, 3, 5, 7, 11, 13, 17, 19 b prime numbers 5 a 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 b 1, 2, 4, 13, 26, 52