74.
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There are 16 such numbers.
Out of those 100 numbers, 21 of them are prime numbers, so the remaining (100 - 21) = 79 are composite.
There are 10 composite numbers from 90 to 100 (including the boundaries):90, 91, 92, 93, 94, 95, 96, 98, 99 and 100
There are 99 numbers between 0 and 100.
They are: 90 91 92 93 94 95 and 96 which are between the prime numbers of 89 and 97