Composite numbers less than 70 and greater than 60 are 62, 63, 64, 65, 66, 68 and 69.
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3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
There are 7 composite numbers greater than 20 and less than 30:21, 22, 24, 25, 26, 27, 28
90, 91, 92, 93, 94
They are all composite.
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.