Foundation June 2018 Paper 3 Q11
11 A recipe for flapjacks uses only oats, butter and syrup, in the ratio 3 : 2 : 1.
(a) Pirin makes 1.5 kg of flapjacks.
He uses 600 g of butter.
He uses 600 g of butter.
Has Pirin followed this recipe?
Show how you decide. [4]
(b) Using this recipe, 200 g of syrup are needed to make 10 flapjacks.
Find the mass of oats needed to make 15 of these flapjacks. [3]
Find the mass of oats needed to make 15 of these flapjacks. [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| No and [butter] 500 [with 600] or [total] 1500 with 1800 or [total] [1.5 with] 1.8 or [total] 300 more [than 1500] or [total] [0].3 more [than 1.5] | 4 | B1 for a relevant unit conversion seen with unit given M1 for (1500 or 1.5) ÷ 6 soi 250 or 0.25 or (600 or 0.6) ÷ 2 M1 for [butter=] their 250 oe \(\times\) 2 or [total=] their 300 oe \(\times\) 6 soi 1800 or 1.8 | Must be used in solution EG 1.5[kg] = 1500g or 1800[g] = 1.8kg Accept equivalent methods See AG May be implied by [syrup=] 300 or 0.3 Their 300 is their mass of syrup May be their 300\(\times\)3 + their 300\(\times\)2 + their 300 or 900 + 600 + 300 |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 900 | 3 | M2 for 200 \(\times\) 3 \(\times\) 1.5 oe or M1 for [oats =] 200\(\times\)3 soi 600 or [oats =] 200÷10\(\times\)3 soi 60 or [syrup =] 200÷10\(\times\)15 soi 300 or 15 ÷ 10 soi 1.5 | Accept in kg throughout oe may be \(\dfrac{200}{10} \times 3 \times 15\) or \(\dfrac{200}{10} \times 15 = 300\) then their 300 \(\times\) 3 600g oats in 10 biscuits 60g oats in 1 biscuit 300g syrup in 15 biscuits May be seen as [...] \(\times\) 3 ÷ 2 |