Foundation June 2023 Paper 2 Q13
13 28 is increased by 25%
40 is decreased by 15%
Which answer is bigger?
Show how you decide. [4 marks]
| Answer | Mark | Comments |
|---|---|---|
| Correct method or evaluation for the 25% or the 15% or correct multiplier for the increase or the decrease seen | M1 | eg \(28 \times 0.25\) or 7 or \(40 \times 0.15\) or 6 or 1.25 or 0.85 oe |
| Correct method or evaluation for either calculation | M1dep | eg \(28 + 28 \times 0.25\) or 35 or \(40 \times 0.85\) or 34 |
| Correct method or evaluation for both calculations | M1dep | |
| 35 with 34 seen | A1 | oe eg 28 increased by 25% with 35 and 34 seen |
Additional guidance
| \(28 \times 1.25\) or 35 | M1M1 |
| \(40 \times 0.85\) or 34 | M1M1 |
| \(28 \times 1.25\) or 35 and \(40 \times 0.85\) or 34 | M1M1M1 |
| Build-up methods must be correct or show correct method for each step eg 1 10% = 2.8, 5% = 1.4, 25% = 7 eg 2 10% = 2.8, 5% = \(2.8 \div 2\) = 1.8, 25% = 7.4 (error in build-up but method shown for that step) eg 3 10% = 2.8, 5% = 1.8, 25% = 7.4 (error in build-up and method not shown for that step) | M1 M1 M0 |
| 35 and 34 seen and 35 chosen by eg circling | M3A1 |
| For \(28 \times 0.25\), do not accept \(28 \times 25\%\) unless recovered |