Posted by mathemagiacian on Thursday, August 15, 2013 at 6:19pm.
A four by four grid of unit squares contains squares of various sizes (1 by 1 through 4 by 4), each of which are formed entirely from squares in the grid. In each of the 16 unit squares, write the number of squares that contain it. For instance, the middle numbers in the top row are 6s because they are each contained in one 1*1 square, two 2*2, two 3*3, and of course the one 4*4.
What is the sum of all sixteen numbers written in this grid?
How about a ten by ten grid?
I really hope to see the answer. Thanks! :)

MATH  MathMate, Thursday, August 15, 2013 at 7:34pm
What did you get?
You would be well to do the 4x4.
If you have difficulties, start with a 1 by 1, then 2 by 2 and then 3 by 3 grid. You will find a pattern that you can use later.
Once done, do an n × n grid and check if the answer for n × n works for n=4.

MATH  HI, Tuesday, August 12, 2014 at 8:10pm
104

MATH  yea, Saturday, November 15, 2014 at 5:48pm
The Grid looks like this:
4 6 6 4
6 10 10 6
6 10 10 6
4 6 6 4

MATH  哈羅, Wednesday, August 12, 2015 at 2:23am
what about ten by ten
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