Originally posted by flipshark

3) You have 3 piles of pennies in 8 rows. They add up to 9 each way, across and down. It's a square with nothing in the middle. You get 4 more pennies. Total of 28 pennies. Arrange the pennies in 8 rows to equal 9 every way that you can add them. You can take pennies away from a pile or add to the piles and the number of pennies in each pile do not have to be the same. For example you can have a pile of 2,and a pile of 3, and so forth. But they have to add up to 9, across, down and vertically if needed. They can be put in any shape. It does not have to be a square. You have to use all 28 pennies.
So for this one, can you build a square as follows?

2-6-1
6___6
1-6-2

Or does it have to add up across the middle axis (the rows that currently add up to 12)?

#

ps. I should note that my best understanding of the starting setup is:
3-3-3
3___3
3-3-3
[Edited by octothorp on 07-09-2002 at 03:42 PM]