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1) Cross out 5×5**
In the square below, cross out numbers until the sum is 15 in every row and column:
2) Cross out 7×7**
In the following square, cross out numbers till you the sum is 15 in every row and column:
This type of puzzle was probably invented by Rita Hovestad or Marenke Wiersma, editors of Sanders Brainteaser no 5.
You can check your solution here for no 1 and here for no 2
A new puzzle is published every friday. The solution is generally published one week later. I welcome your reactions on these puzzles: are they too easy, too difficult, are trhere any multiple solutions? How long did you need to solve it?
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