Foundation November 2017 Paper 1 Q19

19 Use \(\qquad\) 2 gallons = 9 litres \(\qquad\) to convert 17 gallons into litres. [3 marks]

Mark scheme

Answer	Mark	Comments
Method for equating gallons to litres beyond 2 gallons = 9 litres	M1	eg \(9 \div 2\) or 4.5 \(17 \times 9\) or 153 \(9 \times 2\) or 18 \(9 \times 8\) or 72 \(17 \div 2\) or 8.5
Fully correct method that would lead to the correct answer	M1dep	eg \(9 \div 2 \times 17\) their \(4.5 \times 17\) their \(153 \div 2\) their \(18 \times 4 +\) their 4.5 their 72 + their 4.5 their \(8.5 \times 9\)
76.5	A1

2 gallons = 9 litres 4 gallons = 18 litres 6 gallons = 36 litres (error with working not shown) 8 gallons = 45 litres 45 + 45 + 4.5 = 94.5	M1M0A0
2 gallons = 9 litres 9 + 9 = 18 so 4 gallons = 18 litres 18 + 9 = 36 so 6 gallons = 36 litres (method correct) so 8 gallons = 45 litres 45 + 45 + 4.5 = 94.5	M1M1A0