Wiki User
∙ 2013-03-18 02:44:1420
20 is between 10 and 30.
10
10
10
18
There are 4 numbers that are prime between the number 10 and 20. They are 11, 13, 17, and 19.
The difference between the greatest and least number is the range. For example, if the greatest # in a set of data is 20, and the least # is 10, 20-10=10. 10 is the range.
(10+20)/2 = 30/2 = 15
15
it is 17
the answer is 15