Foundation June 2021 Paper 2 Q12
12 This formula can be used to work out the cost, in riyals, of hiring a bicycle in Qatar for a number of days.
Cost = 65 × number of days + 44
Ghalia hired a bicycle in Qatar for 14 days.
(a) Work out the cost. (2)
This formula can be used to work out the cost, in riyals, of hiring a helmet in Qatar for a number of days.
Cost = 12.5 × number of days
Kasun wants to hire a bicycle and a helmet for the same number of days.
He wants to hire them for as many days as he can.
He has 750 riyals to spend.
(b) Work out how much of the 750 riyals is not spent. (4)
| Scheme | Marks |
|---|---|
| 65 × 14 + 44 oe eg 910 + 44 | M1 |
| Working not required, so correct answer scores full marks (unless from obvious incorrect working) Answer: 954 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| 750 – 44 (= 706) | M1 |
| “706” ÷ (65 + 12.5) (= 9.109...) | M1 |
| “706” – “9” × (65 + 12.5) oe eg “706” – 697.5 | M1 |
| Working not required, so correct answer scores full marks (unless from obvious incorrect working) Answer: 8.5[0] | A1 |
| (4) | |
| (6 marks) |
Notes
M1: dep or clearly adding at least 5 lots of (65 + 12.5)
(77.5, 155, 232.5, 310, 387.5, 465, 542.5, 620, 697.5)
M1: For the sum of (65 + 12.5) to the value under “706” with no more than one error and subtracting from “706”
| Scheme | Marks |
|---|---|
| 750 ÷ (65 + 12.5) (= 9.677…) oe | M1 |
| 750 – “9” × (65 + 12.5) (= 52.5) oe | M1 |
| 52.5 – 44 | M1 |
| Working not required, so correct answer scores full marks (unless from obvious incorrect working) Answer: 8.5[0] | A1 |