User contributions
- 19:05, 12 June 2008 (diff | hist) . . (-11) . . 2003 AMC 12B Problems/Problem 18
- 19:03, 12 June 2008 (diff | hist) . . (+43) . . 2003 AMC 12B Problems/Problem 18
- 19:00, 12 June 2008 (diff | hist) . . (+272) . . N 2003 AMC 12B Problems/Problem 18 (New page: suppose n=a*10^4+b*10^3+c*10^2+d*10+e, where a,b,c,d,e are integers between [0,9] then q=a*10^2+b*10+c, r=d*10+e, and (q+r)%11 = n%11, since 10000<n<99999 there are 9090-910+1=8181 n valu...)
