The sum of the even numbers between 1 and n is 105*106, where n is an odd number, then n=?	Choose the correct choice from the following.
A) 187
B) 193
C) 199
D) 205
E) 211
Let n-1 = 2a.   2+4+...+2a = 2*(1+2+...+a) = 2*(a)(a+1)/2 = (a)(a+1) = 105*106   Then a = 105 and n = 211.   The answer is 211.
<result>E</result>
The sum of the even numbers between 1 and n is 105*106, where n is an odd number, then n=?