There are nine cubes how can i arrange the numbers 1-9 in the boxes.Their sums vertically,horizontally,and diagonally must be 15.

Question

Note:each digit should be used only once.
please do help me

Answer 1

9 1 5
4 8 3
2 6 7

Answer 2

diagonally one way, or both? If both, then I am wrong.

Answer 3

See also
http://www.jiskha.com/display.cgi?id=1310631918