99
There are 50 odd numbers between 0 and 100.Five of them (1, 3, 5, 7, and 9) are outside the range you're considering.That leaves 45 of them, including 11 and 99.
45, 63, 81, 99 4 of them.
The sum of all odd numbers 1 through 99 is 9,801.
The nearest number whose square ≤ 10000 is 100. Then the greatest odd number less that 100 is 99 so there are 50 odd numbers in the range 1- 99 inclusive whose squares are less than 10000.
50 of them.
All of the odd numbers in that range can be factors.
99
99
There are 50 odd numbers between 0 and 100.Five of them (1, 3, 5, 7, and 9) are outside the range you're considering.That leaves 45 of them, including 11 and 99.
Infinity
45, 63, 81, 99, 117
99 is an odd number. Even numbers are evenly divisible by two, while odd numbers are not.
99, 101
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
45, 63, 81, 99 4 of them.
100