Question

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Question is up there
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Answer 1

Let
`n` be the total number of stickers. If she puts 21 stickers on a page, she will fill up
`p` pages such that

`n = 21p + 14`

Suzanna has between 90 and 100 stickers, so

`90 \le n \le 100 \implies 76 \le n - 14 \le 86`

`n-14` is a multiple of 21, and 4•21 = 84 is the only multiple of 21 in this range. So she uses up
`p=4` pages and

`n-14 = 4\cdot21 \implies n = 4\cdot21 + 14 = \boxed{98}`

stickers.