Math Is Fun Forum

visindamaður = scientist

myrkur = darkness

bóndi = farmer

borða = eat

ráðvandur = honest

Thanks.  I was pretty sure it was right because I
discovered if you take the right matrix of a pair
being multiplied, and bring it up an inch so the
corners of the two matrices touch, then you can
draw a square of nxn if A=mxn and B=nxp and
then A goes down the left side of the times table
and B goes across the top of the times table.
I think this deserves a picture sometime.

n x n
square ||
goes  ||      B matrix goes up here
here   ||
--------
 
  A
matrix
goes                 times table goes here
down
here

My mom is watching a movie and they mentioned Wednesday April 14th, 1965.
So add 28 years twice and get 2021, same calendar days setup.
So 2018 end of year use saturdays.
2019 switch to sundays at sept 1st.
2020 switch on march 2nd to monday.
2020 sept 1st switch to tuesday.
2021 Use Tuesday from January thru August 31st, so let's see if the
movie is right...
522 641 631 631 April 6th should be tuesday.
Add 8 days, get April 14th, yes, it is wednesday!!!! Cool, it worked!

sweet zeta;
  I'm watching some great lectures from MIT in 2005 on Linear Algebra.
Here's the youtube title:
Lec 1 MIT 18.06 Linear Algebra, Spring 2005
Lec 2 ...
Lec 3 ...
The insight of the professor is astounding compared to what I didn't learn in college
because my professor was drunk and then they fired him soon thereafter.

well i scratched it out fast on paper, and got
2**(7x-4), which is
(2**7) / 16 I think.

I heard ** was used by IBM once for "to the power of", like the symbol "^".

129492

129294

1036 = 14 x 74
1050 = 14 x 75
1064 = 14 x 76
1078 = 14 x 77

I broke the question into a right triangle for the 105 hypotenuse and the 120 hypontenuse.
I just use hypotenuse times cosine angle for adjacent run,
and hypotenuse times sine angle for opposite perpendicular run.

2976 = 24 x 124 = 24 x 2 x 62 = 24 x 4 x 31
3000 = 24 x 125 = 24 x 5**3 = 24 x 5 x 5 x 5
Good Place To Stop