document.write( "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? \n" ); document.write( "

Algebra.Com's Answer #642822 by josmiceli(19441) $\"\"$ $\"About$

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Adding 25 tiles is:
\n" ); document.write( "12 tiles along one side
\n" ); document.write( "12 tiles along the other side
\n" ); document.write( "1 tile in the corner
\n" ); document.write( "------------------------
\n" ); document.write( "That means there was a $\"+12%2A12+=+144+\"$
\n" ); document.write( "square before adding 25 tiles
\n" ); document.write( " $\"+144+%2B+25+=+169+\"$
\n" ); document.write( " $\"+sqrt%28+169+%29+=+13+\"$
\n" ); document.write( "So, the size of the floor is 13 x 13 tiles \n" ); document.write( "

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