Because 1-20 is smaller than 81-100. The bigger the number, the harder it is to be prime.
3,
Just 3.
Yes.
25 percent of the numbers from 1 to 100 are prime numbers.
67
83, 89, and 97.
Because 1-20 is smaller than 81-100. The bigger the number, the harder it is to be prime.
The numbers 83, 89 and 97 are prime.
Three: 83, 89, 97
The only prime numbers between 81 and 90 is... 83
83
They are: 79+2 = 81
3,
Just 3.
Yes.
The prime numbers (factors) of 100 are: 2 and 5