1) 160 cm of gold wire has a weight of 17.8 grams. Work out the weight of 210cm of the gold wire. a) 23.3625 b) 24.3625 c) 23.5684 d) 24.2456 2) UK petrol costs £1.24 per litre. USA petrol costs $3.15 per gallon. 1 US gallon = 3.79 litres. £1 = 1.47 dollars. Which is cheaper? a) USA b) UK 3) Factorise x2 + 7x a) x(x+7) b) x(x-7) c) x2(x-7) 4) Factorise y2 - 10y + 16 a) (y+8)(y-2) b) (y-8)(y+2) c) (y-8)(y-2) 5) 2t2 + 5t + 2 = (2t+1)(t+2) a) (t+1)(t-2) b) (2t+1)(t+2) c) (2t-1)(t-2) 6) Bill's weight decreases from 64.8 kg to 59.3 kg. Calculate the % decrease in Bill's weight. Give your answer to 3 significant figures. a) 8.52 b) 8.49 c) 8.38 d) 8.42

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