In which test did David do better ? French - 20/25, German - 27/36. (Show all working). 2. Ruth left £2400 in the bank for 3 years where her savings grew with a compound interest rate of 4·5% p.a. Calculate how much Interest she was due. (Show all working). 3. A small iceberg weighs 50 000 kilograms. As it heats up, it loses 6% of its weight each day. What will it weigh at the end of 3 days ? 4. After getting a pay rise of 8%, Lucy’s hourly rate goes up to £4·86. What was Lucy’s hourly rate before the rise ? 5. Write down how many significant figures there are in each of these numbers :- a) 57000 b) 0.0754 c) 0.607 d) 3402 6. I deposited £25 531 in the Building Society, receiving an interest rate of 1·84% per annum. Calculate my interest for the year, correct to 2 sig. figs. 7. Calculate: 9 – 2 x 3 (b) 15 – 6 ÷ 3 (c) 9 x (12 – 10) ÷ 5 (d) 9 x 12 – 10 ÷ 5 (i) ½ of 6 + 8 (j) ½ of (6 + 8)
Round the following to 2 significant figures: a) 905 b) 8467 c) 46.89 d) 0.006543 2. Sarah left £6700 in the bank for 5 years where her savings grew with a compound interest rate of 6% p.a. How much will Sarah have in her account after 5 years? 3. In a storm, 15% of the trees in a forest are felled. If the forest has 18700 trees left standing, how many trees were there originally? 4. A painting was bought for £200 and sold for £240. Calculate the percentage profit. 5. Simplify the following ratios: a) 42 : 49 b) 14 : 84: 21 c) 3 : 4 2 6. The ratio of yellow to blue painted needed to make a specific shade of green is 5 : 8. If I have 96 tins of blue, how many tins of yellow will I need to make this green paint? 7. Share £396 in the ratio 4 : 7.