Math Is Fun Forum

19227

check 13-divisibility by long division in head: 19 is 1R6 62is4R10 102is7R11 117is9R0, Ouais, Yup.

bbbm:  Congrats on your new appointment here.  I like the title!!  Does this mean anything I should know such as the health of our beloved RPMF.

my internet is shaky...  can't connect for long... see you in a few years when technology improves out here in the sticks...

Thanks a bunch!! crls -Jhn
Just so you know why I'm doing this, I created an eight day week and a six day week and I have
them in my calendar on my phone so just for fun but I just found the old notecard I started the
six day week on in a drawer full of decade old things, but the eight-day week I just started
back on March 31 of 2012.  It turns out they never meet each other, the 8 and the 6, they pass
by each other every 24 days though. 
Thanks again!!

The triangle dots on the perimeter are counted so it is inclusive in this way.
The interior dots if any are also counted.  There is a fairly simple formula
for that gets the number of dots given any geoboard triangle, but my mehtod
is much harder as it makes a rectangle around the triangle and then
subtracts off the 3 right triangles, which I have a mehtod for which is not
really easy, because you have to find the number of dots on the hypotenuse
by finding prime factors in common between the vertical and horizonat runs or
legs of the right triangle.  So the whole process is much harder than the answer
in the book I don't have, but may be able to get it if her relatives can find it as
she passed away a couple years ago, a dear friend of mine, and spectacular
at mathematics too with a masters in math.

Oh, 43560 it seems actually.

Without looking back to post#1, my post#2 says 8 or 9 would work with these silly restraints.

13 - 4= 9 that is the maximum one, so use the max and the min of 1 and 9 max and square root it to 3.

In my post#2 method, if you do 8 minus 8 and get zero, you call it 8.  There is no number below one in the rules.

I think the answer is 8 or 9 in missing corner.  My reasoning is that the difference between adjacent sides form 2 and 3 and
2 times 3 is 6 in the middle.  Now if you always difference (subtract) adjacent sides and make positive and choose the
smallest and greatest ones and multiply them you get the middle, but also if the number is a perfect square such as
4, 9, 16, 25, 36, 49, 64, 81 , 100, etc, then you write down the square root in the middle.  That's the best I could do for you.

Why not state a problem?  We might learn from your question, and this could help our future studies of the topic.
Nash Equilibrium, wow, that's the John guy from "A Beautiful Mind", cool.  I'm stupefied!

Wow, my program didn't catch that, but it makes sense cause squares go up by odd numbers.