Math Forum / Mathematics / Recreational Math / February 2010

            this has completly escaped me:
I know that 3576.41 is 15% of something but how to i find the orignal
total?
Many thanks

Greetings all
I'm trying to figure out a way to
1)phase shift
2)vertical shift

What is the name of the engineer/mathematician who authored the
theorem/conjecture that the most common leading integer of calculations is 1
?

How can numbers be represented as character strings, in such a way
that the alphabetical order of the strings is the same as the order of
the corresponding numbers?
For example, the integers 1, 2, ... can be represented as the letters

Proposition.
When a game of Soduko is complete, a digit such as 1, will
occupy a different position in each of the nine 3x3 squares.
True or False?  Reasons?

L. Jacobi and D. Madden proved that a^4+b^4+c^4+d^4 = e^4 has an
infinite number of distinct, non-trivial rational solns by solving the
case,
a^4+b^4+c^4+d^4 = (a+b+c+d)^4

I surprised how you could solve this issue below
I tried many times but no way
I'll appreciate your help to send me more details about how I understand it
In geometry.puzzles al263@lafn.org (William Stern) said:

I propose a simple gambling problem, which I'm afraid might be too easy for
this group.  My *real* question is:
   How well known is this problem and its solution?
You have $X but need $Y.  (I don't think X and Y matter much; let X = 100,