There are 7 composite numbers greater than 20 and less than 30:
21, 22, 24, 25, 26, 27, 28
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3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
Composite numbers less than 70 and greater than 60 are 62, 63, 64, 65, 66, 68 and 69.
88 is a composite number because it is an even number. All numbers greater than 8 and less than 100 are composites if they are even numbers, if they are multiples of 3 or 7, or if they end in 5 or 0.
109 whole numbers greater than 9 and less than 999 are multiples of 9
90, 91, 92, 93, 94