What is the sum of the numbers between 1 and 5, inclusive?	Choose the correct choice from the following:
A) 5  B) 10  C) 15  D) 20  E) 25
Sol. add numbers between 1 and 5.   Answer = 15, 15.
<result>C</result>
What is the sum of the numbers between 1 and 5, inclusive?