Easy -1.2 This is a straightforward arithmetic progression question requiring only the application of the standard formula a_n = a + (n-1)d. Students find d from the two given terms, then substitute to find the 30th term—a routine two-step calculation with no conceptual challenge or problem-solving required.
Or any valid method to find a using their d or d using their a
or findingu directly from either u or u and d.
30 4 8
15 5
u = +29 =80
30
Answer
Marks
2 2
A1
3
Answer
Marks
Guidance
Question
Answer
Marks
Question 1:
1 | a+3d =15 and a+7d =25 | M1 | Or forming any valid equations which can be used to find d or
a.
5 15
Finding a and d d = , a=
2 2 | DM1 | Or any valid method to find a using their d or d using their a
or findingu directly from either u or u and d.
30 4 8
15 5
u = +29 =80
30
2 2 | A1
3
Question | Answer | Marks | Guidance