(a(i))[1]
State the next term.
(a(ii))[1]
Give the rule used to extend the sequence.
(b)[2]
Work out the first three terms of this sequence.
(c(i))[2]
Fill in the table.
(c(ii))[2]
Determine an expression, in terms of $n$, for the number of lines in Pattern $n$.
(c(iii))[1]
Jake claims that one of these patterns can be made using exactly 105 lines. Explain, without any working, why this is incorrect.