Question

PLEASE HELP!!!!!
Meredith has a set of ninety 1-inch tiles. If she starts with one tile, then surrounds it with a ring of tiles to create a larger square, how many surrounding rings can she make before she runs out of tiles?

Answer 1

how many tiles will be used in first ring ?

Answer 2

can u imagine and answer that ?

Answer 3

the pattern is 3^2-1^2, 5^2 -3^2 ,....
which is 8,16,24,32.....
multiples of 8
see whether u get this ?

Answer 4

so when will the sum be less than 90.... ?

Answer 5

you can draw a picture then try to find a pattern to how many tiles you need as you add a ring around it

so starting from the first tile
1, 4, 8 ...