(a)[2]
Fill in the table for Pattern 5.
(b)[2]
Write an expression, in terms of $n$, for the number of grey mats in Pattern $n$.
(c)[2]
Work out the total number of mats in this pattern.
(d)[6]
Find the value of $a$ and the value of $b$.
Mathematics 0580 · IGCSE · Sequences
Sequences — practice question
Marco is creating patterns using grey and white circular mats. Pattern 1, Pattern 2, Pattern 3 and Pattern 4 are illustrated as triangular groups of circles. These patterns make a sequence. Marco then prepares a table to display some information about the patterns.