Foundation June 2018 Paper 1 Q14
14 Aditi, Becky and Calli collect coins.
Aditi has 6 more coins than Becky.
Calli has 1 less coin than Aditi.
Altogether they have 71 coins.
How many coins do they each have?
Show all your working. [5]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 26, 20, 25 | 5 | M2 for any complete correct equation or M1 for any two expressions e.g. \(x\), \(x + 6\), \(x - 1\) oe or equations using more than one variable e.g. A = B + 6; C = A – 1, A + B + C = 71 A1 for \(x = 20\), or \(x = 26\) or \(x = 25\) B1 for Aditi 26 or Becky 20 or Calli 25 IF less than 3 marks scored SC3 for 3 correct values attributed to the wrong person as final answer | \(x + x + 6 + x + 6 - 1 = 71\) oe or \(x + x - 6 + x - 1 = 71\) oe or \(x + x + 1 + x - 5 = 71\) oe Allow other letters for \(x\) must be different A = B + 6 is the same as B = A - 6 Accept equivalent methods |