Mandai Freehold B2 Industrial Space - 新加坡唯一一个B2永久重型工业厂房.

Mandai Freehold B2 Industrial Space - 新加坡唯一一个B2永久重型工业厂房.
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Monday, October 31, 2016

Maths puzzle

In this matrix, there are 9 boxes which contain a unique number from 1 to 9 and no repetitive number in each box.  If you add each row and each column, you will get 15 from each row and column.  If you add diagonally, you will also get 15.  Please solve this puzzle.
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