SOLUTION: Gina laid tiles on the floor. She began with 1 square tile at the corner of the room. She adds three tiles to form a 2 x 2- tile square and then 5 tiles to form a 3 x 3- tile squar

Question 1027590: Gina laid tiles on the floor. She began with 1 square tile at the corner of the room. She adds three tiles to form a 2 x 2- tile square and then 5 tiles to form a 3 x 3- tile square. She continues in this way until the whole floor is covered. Last she adds 25 tiles. What is the size of the floor?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Adding 25 tiles is:
12 tiles along one side
12 tiles along the other side
1 tile in the corner
------------------------
That means there was a
square before adding 25 tiles

So, the size of the floor is 13 x 13 tiles
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