Foundation November 2017 Paper 1 Q24
24 Kiaria is 7 years older than Jay.
Martha is twice as old as Kiaria.
The sum of their three ages is 77
Find the ratio of Jay’s age to Kiaria’s age to Martha’s age. (4)
| Answer | Mark | Notes |
|---|---|---|
| 14:21:42 | P1 | for 2 out of 3 expressions in one letter eg from \(x\), \(x+7\), \(2x+14\) or see a set of numbers to show interpretation of the relationships, eg 10, 17, 34 |
| P1 | (dep) for sum of their 3 expressions \(= 77\) eg \(x + x+7+2x+14 = 77\) oe or 2 systematic correct trials including addition | |
| P1 | for a correct process to isolate their term in \(x\) or \(x = 14\) | |
| A1 | for ratio 14:21:42 oe |