CSEC Mathematics · January 2010 · Paper 2 · Question 8(a)(iii)

Bianca makes patterns of hexagons using sticks of equal length. The number of sticks used for patterns with 1, 2, 3, 4, 5, 20, and n hexagons is given in a table.

Determine the value of z.

This question uses a figure or table from the paper — you'll see it when you practise.