The pages of a report are numbered consecutively from \(1\) to \(10.\) If the sum of the page numbers up to and including page number \(x\) of the report is equal to one more than the sum of the page numbers following page number \(x,\) then \(x =\)
A. 4
B. 5
C. 6
D. 7
E. 8
Answer: D
Source: GMAT Paper Tests