Here are the first 5 terms of a sequence.
kkk, k+5k + 5k+5, k+10k + 10k+10, k+15k + 15k+15, k+20k + 20k+20
Find an expression, in terms of n n\,n and kkk, for the n n\,nth term of this sequence.
208 exam-style questions on OCR GCSE Maths Sequences (Nth Term). Each one has a worked solution and a mark scheme showing where the marks go.