The sum of all the integers k such that –21 < k < 24 is Options:
A) 0
B) -2
C) -25
D) -39
E) -51
-20------------------0-----------------23   values upto+23 cancels outwe are left with only -20-19 sum of which is - 39. hence option D.   -39
<result>D</result>
The sum of all the integers k such that –21 < k < 24 is