There is an infinite number of numbers between 0 and 20.
20
For a number to have [only] 2 factors, it must be a prime number; the prime numbers between 0 and 20 are; 2, 3, 5, 7, 11, 13, 17, 19
composite numbers between 0-20: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18
1 and 5
20 percent is a number whose value is between 0 and 1 so there is no way to represent it as a whole number.
20 number
To the left of 0, between -21 on its left and -19 on its right.
There are 9 prime numbers between 0 and 20: 1,2,3,5,7,11,13,17,19.
-16
Well the way I look at it is... find the total distance between the two numbers and divide by 2. so... -15 is 15 away from 0, and 20 is 20 away from 0. I then add 15 and 20 together to get 35. I take 35 and divide by 2 to get 17.5. From here you can either add 17.5 to -15 or subtract 17.5 from 20. The answer is 2.5 Another way to look at this is with a line so... each period is equal to 1 number, the 0 in the line is the number 0 -15..............0...................20 You can see that the distance is greater on the right side because 20 is farther away from 0 than -15 is. You have to find the total distance between the -15 and 20 and divide by 0.
Oh, what a lovely question! Between 0 and 20, there are 21 integers in total. You see, we start counting at 0 and include all the numbers up to 20, making it a grand total of 21 integers. Just imagine all those numbers, each one unique and special in its own way.