90, 95 and 92 are composite numbers because they have other factors aside from 1 and themselves.
Other factors of:
90: 2, 3, 5, 6, 9, 10, 15, 18, 30, 45
95: 5, 19
92: 2, 4, 23, 46
The numbers 90, 91, 92, 93, 94, 95, 96, 98, 99 and 100 are composite (including the boundaries).
composite numbers 89-97 = 90, 91, 92, 93, 94, 95, 96
The composite numbers greater than 88 and less than 95 are: 90, 91, 92, 93, 94.(88 and 95 are themselves also composite.)
There are 10 composite numbers from 90 to 100 (including the boundaries):90, 91, 92, 93, 94, 95, 96, 98, 99 and 100
Composite numbers between 89 and 97 are 90, 92, 93, 94, 95, 96.
90, 91, 92, 93, 94, 95, 96, 98, 99, 100 (including 90 and 100)
90, 91, 92, 93, 94
90 91 92 93 94 95 96
90 91 92 93 94 95 96 98 99 100
There are 8 composite numbers between 90 and 100. They are 91, 92, 93, 94, 95, 96, 98, and 99.
Add them up. 90, 91, 92, 93, 94, 95, 96, 98, 99, 100
These steps can reduce our work: First of all we will write all the even numbers between 89 and 97: 90, 92, 94 & 96. Then multiples of 5: 90 & 95. Multiples of 3: 90, 93 & 96 and also the multiple of 7 which is 91. There is no other number left between 89 & 97. Therefore, numbers between 89 & 97 are all composite numbers.