Math Forum / Mathematics / Recreational Math / October 2008

Use binary, not decimal.
list the binary fractions in ascending order.
.000000...
.0000000.... etc (your list will just consistof infinite numbers of zeros)

The behavior of elementary transcendental functions, with a real
argument (x), are well known (or should be) to every science student
and researcher.  However, this is not the case for the same functions
with a complex argument (z = x+iy; x,y real).

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An idea for a lottery system just struck me which is so barkingly mad
that it might be fun to try. The problem is that it needs a very large
magic square as a driver, at least 100x100 but the bigger the better up
to 256x256 (the maximum number of columns per page in my ...

The behavior of elementary transcendental functions, with a real
argument (x), are well known (or should be) to every science student
and researcher.  However, this is not the case for the same functions
with a complex argument (z = x+iy; x,y real).

Do you suffer from a tough class? Are you looking for instructor
solutions manual to do your homework? Just send me email with its name
and edition and I may be able to help you in low price! It is my list,
however if you don't find it here don't give up because it is only a

Google Groups is on one of their delay things again so I can't see my
new messages, so I can't reply through Google Groups, which is what I
use to reply, to criticisms I see that have arisen.
So I'll make this post to note the problem, which hopefully will clear

I'm assuming that the group is not dead through the encroachment of
spam and nuts...
But I need to know what is the minimal set-theoretic structure that
supports differentiation - and no, answering "R" doesn't actually

A publication called Journal of Recreational Mathematics
reports the following two cryptarithms:
[1] Two ways to eighteen by Donald Knuth (the famous computer scientist):
SEVEN + TEN + ONE = THREE + NINE + SIX

Find the equation of the inscribed circle of the triangle formed by the lines
4x-3y+9 = 0
12x+5y-43 = 0 and
7x+24y+19 = 0

Given a 30-60-right triangle with the short leg equal to  x and the
hypotenuse = 2x ...... the question is find the cosine of angles alpha and
beta?
I'm using a book that never gives any answers  :-(     Trigonometry  by I.M.

A vertical post subtends an angle alpha at a point A in the same horizontal plane as the foot of the post. Two particles are projected at the same instant from A in directions making angles of theta(1) and theta(2) with the horizontal, so that the former strikes the top of the ...

I'm kicking back now kind of wondering to myself as I try to get some
sense of the feeling of accomplishment with the discovery of my own
infinite series, and the wild thing to me is the feeling that, hey,
good thing I didn't find this thing years ago as I can't see how I'd

I was just re-reading one my blog posts which explain with extremely
simple mathematics why the ring of algebraic integers is flawed:
http://mymath.blogspot.com/2008/04/re-visiting-non-polynomial.html
And considering how simple it is to explain there is no rational

I am an engineering student with a simple geometric relationship
question I was hoping someone might be able to assist with. I've made
a dodgy sketch of it available at:
http://img162.imageshack.us/my.php?image=dryergeometryproblemyb8.jpg