# A page out of a magazine had a 15 by 15 sheet of 225 stickers. How many of these stickers are not on the border of the page?

## If they are the same size, then on the border there are 15*2+13*2

the rest of the stickers are inner stickers.

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## To find out how many stickers are not on the border of the page, we need to calculate the number of stickers on the border first.

The page is 15 by 15, which means it has 15 stickers along each edge. Since it's a square page, the total number of stickers on the border is equal to the sum of stickers along all four edges.

On one edge, there are 15 stickers. So, on all four edges, there would be 15 x 4 = 60 stickers.

The total number of stickers on the page is given as 225. Therefore, the number of stickers that are not on the border can be calculated by subtracting the number of stickers on the border from the total number of stickers:

Total stickers - Stickers on border = 225 - 60 = 165.

Therefore, there are 165 stickers that are not on the border of the page.

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## To find the number of stickers that are not on the border of the page, we need to determine the number of stickers on the border first.

The magazine page has a dimension of 15 by 15, so it has a total of 15 stickers along each row and 15 stickers along each column. Since the border consists of stickers on the first row, last row, first column, and last column, it would be:

First row: 15 stickers
Last row: 15 stickers
First column: 15 stickers (excluding the first and last element in both the first and last row)
Last column: 15 stickers (excluding the first and last element in both the first and last row)

The number of stickers on the border is therefore:
First row + Last row + First column + Last column
= 15 + 15 + (15-2) + (15-2)
= 30 + 13 + 13
= 69 stickers

Now, to find the number of stickers that are not on the border, we subtract the number of border stickers from the total number of stickers on the page:

Total number of stickers - Number of border stickers
= 225 - 69
= 156

Therefore, there are 156 stickers that are not on the border of the page.

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