In a magic square, the numbers in each row, each column and the two main diagonals have the same total. This magic square uses the integers 2 to 10, with the grid shown having entries 10,5 in the top row (top-left cell blank), 8,4 in the middle row (middle cell blank), and 7,2 in the bottom row (bottom-right cell blank). Which of the following are the missing cells?
(A) 693 (B) 639 (C) 396 (D) 369 (E) 963

Want a route through all this instead of an archive?
The track
puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.