Foundation June 2019 Unit 2 Q10
10.
(a) Describe in words the rule for continuing each of the following sequences.
(i) 38, 32, 26, 20, … [1]
Rule:
Rule:
(ii) \(\dfrac{1}{4}\), \(\dfrac{1}{2}\), 1, 2, … [1]
Rule:
Rule:
(b)
(i) Adam has \(x\) marbles. His friend gives him 3 more.
Write down, in terms of \(x\), the total number of marbles Adam now has. [1]
Write down, in terms of \(x\), the total number of marbles Adam now has. [1]
(ii) Petrol costs £\(g\) per litre.
Write down, in terms of \(g\), the cost of 15 litres of petrol. [1]
Write down, in terms of \(g\), the cost of 15 litres of petrol. [1]
| Scheme | Marks | Comments |
|---|---|---|
| (i) Subtract six (from the previous term) | B1 | Accept 'take away 6' or '(goes) down in 6s'. Allow -6. B0 for n-6 |
| (ii) Double (the previous term) | B1 | Accept 'multiply by 2' or ‘times by 2’. Allow ×2. B0 for n×2 |
| Scheme | Marks | Comments |
|---|---|---|
| (i) \(x + 3\) | B1 | Mark final answer. |
| (ii) (£)15g | B1 | Mark final answer. Accept 15 × g |