Foundation June 2023 Paper 3 Q5
5
(a) The term-to-term rule for a sequence is
| subtract 1 then multiply by 5 |
The 1st term is 4
Work out the 3rd term. [2 marks]
(b) The term-to-term rule for a different sequence is
| add 20 then divide by 2 |
The 2nd term is 50
Work out the 1st term. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| 15 | B1 | implied by 70 or 345 |
| (3rd term =) 70 | B1ft | ft (their \(15 - 1) \times 5\) |
Additional guidance
| 15 70 on answer line | B1B1 |
| 15 and/or 70 seen but not final term eg Answer 345 | B1B0 |
| Answer only 345 | B1B0 |
| Answer | Mark | Comments |
|---|---|---|
| \(50 \times 2\) or 100 | M1 | |
| 80 | A1 | SC1 120 or 5 or 60 |
Additional guidance
| 80, 50, … on answer line | M1A1 |
| 80, 50, … in working with answer line blank | M1A1 |
| 80, 50, … in working with 35 on answer line | M1A0 |
| \(80 + 20 \div 2 = 50\) without answer 80 (embedded answer) | M1A0 |