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Mathematics 18 Online
OpenStudy (anonymous):

How many 2-digit intergers greater than 20 are there?

zepdrix (zepdrix):

Hmm \(\large 100\) is the first 3-digit integer. So you just need to determine how many Integers there are between \(\large 20\) and \(\large 100\). But be sure to exclude the 20 and 100 when you count.

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