Recent content by WJMeyer

  1. W

    Prove 1001×1001 symmetric table has all numbers on diagonal

    A square table of size 1001x1001 is filled with the numbers 1; 2; 3; ... ; 1001 in such a way that in every row and every column all those numbers appear. If the table is symmetric with respect to one of its diagonals, prove that in this diagonal all of the numbers 1; 2; 3; ... ; 1001 appear.
  2. W

    How should you draw this sketch?

    Let ABCD be a parallelogram with acute angle at A. Let E be the foot of the perpendicular from C to the line AB and let F be the foot of the perpendicular from C to the line AD.