Foundation November 2021 Paper 3 Q10
10 Boxes of chocolates each contain 25 chocolates.
One box costs £3.25
A shop has a special offer.
| Two boxes for £5 |
How much cheaper per chocolate is the special offer? [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(3.25 \div 25\) or 0.13 or \(325 \div 25\) or 13 or \(5 \div (2 \times 25)\) or \(5 \div 50\) or 0.1(0) or \(500 \div (2 \times 25)\) or \(500 \div 50\) or 10 | M1 | oe cost of a chocolate in a single box cost of a chocolate from special offer |
| \(3.25 \div 25 - 5 \div (2 \times 25)\) or their 0.13 \(-\) their 0.1(0) or 0.03 or \(325 \div 25 - 500 \div (2 \times 25)\) or their 13 \(-\) their 10 | M1dep | oe their 0.13 and their 0.1(0) must come from correct methods their 13 and their 10 must come from correct methods |
| 3 | A1 | condone £0.03 on answer line |
| Alternative method 2 | ||
| \(2 \times 3.25 - 5\) or \(6.5(0) - 5\) or 1.5(0) or \(2 \times 325 - 500\) or \(650 - 500\) or 150 | M1 | difference in cost of two boxes |
| their \(1.5(0) \div (2 \times 25)\) or 0.03 or their \(150 \div (2 \times 25)\) | M1dep | oe \(1.5(0) \div 50\) oe \(150 \div 50\) |
| 3 | A1 | condone £0.03 on answer line |
| Alternative method 3 | ||
| \(3.25 - 5 \div 2\) or \(3.25 - 2.5(0)\) or 0.75 or \(325 - 500 \div 2\) or \(325 - 250\) or 75 | M1 | difference in cost of one box |
| their \(0.75 \div 25\) or 0.03 or their \(75 \div 25\) | M1dep | |
| 3 | A1 | condone £0.03 on answer line |