Grace uses tiles to create patterns as shown.
- Find the number of tiles in Pattern 7.
- Which pattern has 81 tiles?
(a)
Pattern for the number of tiles
Pattern 1: 1 x 1 = 1
Pattern 2: 2 x 2 = 4
Pattern 3: 3 x 3 = 9
Pattern 4: 4 x 4 = 16
Formula:
Number of tiles = Pattern number x Pattern number
Number of tiles for Pattern 7
= 7 x 7
= 49
(b)
81 = 9 x 9
Pattern number for 81 tiles = 9
Answer(s): (a) 49; (b) 9