Foundation June 2022 Paper 3 Q7
7
(a) In a recipe, the ratio of the amount of flour needed to the amount of butter needed is \(4 : 1\).
Rowan mixes 4 kg of flour with 1 g of butter.
Explain what Rowan has done wrong. [1]
Rowan mixes 4 kg of flour with 1 g of butter.
Explain what Rowan has done wrong. [1]
(b) Azmi gives \(\dfrac{1}{10}\) of their earnings to charity and keeps the remainder.
For Azmi’s earnings, find the ratio of the amount they give to charity to the amount they keep.
Give your answer in its simplest form. [2]
For Azmi’s earnings, find the ratio of the amount they give to charity to the amount they keep.
Give your answer in its simplest form. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| He has not used [masses in] the same units or correct example of amounts e.g. [4kg and] 1kg [of butter] or 4g [of flour] [and 1g] | 1 | See Appendix Accept amounts for masses The units are mixed/not the same Do not accept “measurements” for “units” but may be clarified later Mark the best part if no contradiction | |
Appendix
Exemplar responses for Question 7a
| Reason | Judgement | Mark |
|---|---|---|
| He should have converted the kg into grams | Correct | 1 |
| He only put a gram of butter when it should have been a kilogram | Correct | 1 |
| He used kg and g and these should be the same | Allow these referring to units | 1 |
| He only used 1 g but it should be 1 kg | Correct example | 1 |
| He should have used 4 g of flour | Correct example of matching units | 1 |
| The measurements should be 4000 g and 1000 g | Correct example in correct order If order incorrect must tell us which is butter/flour | 1 |
| He should have used 4 kg and 1000 g | Correct example even though using mixed units | 1 |
| He added too little butter because he measured in different units | The first part is correct but would, on its own, not get the mark | 1 |
| Rowan has used the wrong units as he has used the ratio 4000 : 1 | Allow example of the ratio he has used An alternative would be 4 : 0.001 | 1 |
| He didn’t put the ratio back to the original numbers | Incorrect as “original” undefined | 0 |
| They are different amounts of measurements | Do not accept amounts or measurements for units | 0 |
| They should have made the conversions the same | Should be, Should make units the same | 0 |
| He only used 1 g of butter | No comparison | 0 |
| He used 1 g and it’s too small | No comparison | 0 |
| They got the units wrong | Does not say that the units should be the same | 0 |
| He added too much butter and he measured in different units | First part is incorrect so award 0 | 0 |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(1 : 9\) | 2 | B1 for \(\dfrac{1}{10} : \dfrac{9}{10}\) or \(10 : 90\) or \(2 : 18\) or \(0.1 : 0.9\) If 0 scored SC1 for answer \(9 : 1\) | Must be a ratio to earn marks |