(2^2+4^2+6^2+.....+18^2)=?
Pick
A) 1322  B) 2356  C) 6544  D) 1140  E) 7954
=(1x2)^2+(2x2)^2,+(2x3)^3+......(2x9)^2   =2^2 x (1^2+2^2+3^2+.......+9^2)   formula is =1/6 n(n+1)(2n+1)   =(4x1/6x9x10x19)   =(4x285)=1140   Answer is 1140
<result>D</result>
(2^2+4^2+6^2+.....+18^2)=?