Foundation June 2017 Unit 2 Q8
8. Eira believes that 4 minutes 48 seconds is less than half of 9 minutes 18 seconds.
Is Eira correct?
You must show all your working. [2]
| Scheme | Marks | Comments |
|---|---|---|
| Intention to halve 9 minutes 18 seconds OR double 4 minutes 48 seconds | M1 | |
| NO, with sight of 4 minutes 39 seconds OR 9 minutes 36 seconds, or 279 (seconds) AND 288 (seconds) or 558 (seconds) AND 576 (seconds) | A1 | Accept equivalent statements e.g. Eira is wrong Allow incorrect notation for time e.g. 4.39, 9.36 (use of decimal points) |
Alternative method 1
| Scheme | Marks | Comments |
|---|---|---|
| Correctly finding the difference between the two times as 4 minutes 30 seconds OR 270 seconds | M1 | |
| NO, with comparison e.g. 4 minutes 30 seconds is less than 4 minutes 48 seconds OR 288 seconds is more than 270 seconds | A1 |
Alternative Method 2
| Scheme | Marks | Comments |
|---|---|---|
| Converting both times to seconds, before dividing one quantity by the other | M1 | |
| NO, with sight of 2(.06…) OR 0.4(84375…) | A1 |
If no marks, award SC1 for attempting to find the difference between the two times and comparing this with 4 minutes 48 seconds.