Marco is making patterns with grey and white circular mats.
The patterns form a sequence.
Marco makes a table to show some information about the patterns.
Pattern number | 1 | 2 | 3 | 4 | 5 |
Number of grey mats | 6 | 9 | 12 | 15 | |
Total number of mats | 6 | 10 | 15 | 21 |
Complete the table for Pattern 5.
Find an expression, in terms of , for the number of grey mats in Pattern .
Marco makes a pattern with 24 grey mats.
Find the total number of mats in this pattern.
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