Sequences
1 mark · EasyThe sequence starts 15, 30, 45, ... What is the common difference?
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
15 (±0.1)
Also accept: +15
Common mistakes: Writing next term instead of difference
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correct answer of 15
Worked solution
Each term increases by 15. Common difference = 30 - 15 = 15.