All but 97
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.
90, 91, 92, 93, 94
There are 10 composite numbers from 90 to 100 (including the boundaries):90, 91, 92, 93, 94, 95, 96, 98, 99 and 100
They are: 90 91 92 93 94 95 and 96 which are between the prime numbers of 89 and 97
The numbers 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99 and 100 are composite (including the boundaries).
91, 92, 93, 94, 95, 96, 98, 99, 100
The numbers between 89 and 97 are: 90, 91, 92, 93, 94, 95, 96. All even numbers greater than 2 are composite. All numbers greater than 5 are divisible by 5 are composite. 93 is divisible by 3, so that only leaves 91 as a prime number. The composite numbers are 90, 92, 93, 94, 95, 96.
composite numbers 89-97 = 90, 91, 92, 93, 94, 95, 96
The numbers 90, 91, 92, 93, 94, 95, 96, 98, 99 and 100 are composite (including the boundaries).
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.
There are 8 composite numbers between 90 and 100. They are 91, 92, 93, 94, 95, 96, 98, and 99.
92 is an even number greater than 2 and all even numbers greater than 2 are composite numbers.
4, 46, 92 are the composite factors of 92.
90, 91, 92, 93, 94
90 91 92 93 94 95 96
There are 10 composite numbers from 90 to 100 (including the boundaries):90, 91, 92, 93, 94, 95, 96, 98, 99 and 100
Add them up. 90, 91, 92, 93, 94, 95, 96, 98, 99, 100