What is the value of n if the sum of the consecutive odd integers from 1 to n equals 169? Choices.
A) 47
B) 25
C) 37
D) 33
E) 29

Rationale: # of terms = ( n - 1 / 2 ) + 1 { ( last term - first term ) / 2 + 1 | sum = ( 1 + n ) / 2 * # of terms = ( n + 1 ) ^ 2 / 4 = 169 n + 1 = 13 * 2 n + 1 = 26 n = 25 . answer : b
Answer: B