80, 81, 82, 84, 85, 86, 87, 88, 90
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All of them except for 83 and 89 which are prime numbers
60 and 80 :D
70 and 90
90 is composite, 117 is prime.
The numbers 90, 91, 92, 93, 94, 95, 96, 98, 99 and 100 are composite (including the boundaries).