Archive for March, 2009
Monday, March 30th, 2009
Quan and Daniel have posted the answer to MMM #28 at Blinkdagger so now it's time for MMM #29.
I call this one the "mother of all clock angle problems." Some of you may have run into those problems where you have to figure out the angle between the two hands ...
Posted in Uncategorized | 9 Comments »
Friday, March 27th, 2009
Here's an interesting equation:
[pmath size=12] 50 1/2 + 49 38/76 = 100 [/pmath]
It's interesting because the left side of the equation uses each of the digits between 0 and 9 exactly once.
Here's another example:
[pmath size=12] 97 30/45 + 2 6/18 = 100 [/pmath]
Can you find other such equations where the ...
Posted in Uncategorized | 6 Comments »
Monday, March 23rd, 2009
Texas Instruments (TI) and Wild About Math! are collaborating on a new exciting contest. It’s about Math but in a different, but still creative way. TI will be donating two of their high-end CAS calculators to two of you. This is a truly advanced calculator. The TI-Nspire CAS state-of-the-art computer ...
Posted in Uncategorized | 1 Comment »
Saturday, March 21st, 2009
You have until Monday night at midnight to submit your answer to MMM #28 at Blinkdagger.
Here's the problem:
The Problem Statement
Daniel: Hey Quan, we just received a shipment of the latest Green MacBook Pros from Apple Inc. Unfortunately, they heard about what we did to the last shipment, so they only ...
Posted in Uncategorized | No Comments »
Friday, March 13th, 2009
Random.org has picked Dooglius as the winner of MMM #27. Congratulations, Dooglius!
The answer to the problem is 1/(w^3-w^2-w+1), or 1/((1-w^2)(1-w))
Tanaeem M Moosa had a very clever demonstration. Check this out:
Let
s=1 + (w+w^2) + (w^2+w^3+w^4) + (w^3 + w^4 + w^5+ w^6) + (w^4 + w^5+ w^6 + w^7 + ...
Posted in Uncategorized | 2 Comments »
Thursday, March 12th, 2009
William Wallace sent me the following email so I'm inspired to promote his puzzle:
I came across your math blog, and thought you might be interested in a puzzle I came up with.
To see how it works, go to (http://blog.coincidencetheories.com/?p=1522). You probably can figure it out first, then go verify. ...
Posted in Algebra | No Comments »
Friday, March 6th, 2009
For a long time I've been very interested in Mathematica as a tool for mathematical exploration. But, I've never been interested in paying nearly $2,500 for the retail version. (Yes, I'm aware that there are steep educational discounts but I'm not a students so those don't apply to me.) Recently, ...
Posted in Uncategorized | 14 Comments »
Thursday, March 5th, 2009
If it's not immediately obvious to you that today is the square root of Christmas, then check this out:
http://twopoint718.blogspot.com/2009/03/march-5-is-square-root-of-christmas.html
SHARETHIS.addEntry({
title: "March 5 is the square root of Christmas",
url: "http://wildaboutmath.com/2009/03/05/march-5-is-the-square-root-of-christmas/"
});
Posted in Uncategorized | No Comments »
Thursday, March 5th, 2009
Texas Instruments (TI) and Wild About Math! are collaborating on a new exciting contest. It's about Math but in a different, but still creative way. TI will be donating two of their high-end CAS calculators to two of you. This is a truly advanced calculator. The TI-Nspire CAS state-of-the-art computer ...
Posted in Uncategorized | 2 Comments »
Monday, March 2nd, 2009
MMM #26 was a tough one. The answer: 3 planes suffice! Read more here.
Here's the next Monday Math Madness! problem. I decided to do an algebra one for a change.
Given that the absolute value of w < 1. Simplify this expression:
1 + (w+w^2) + (w^2+w^3+w^4) + (w^3 + w^4 + ...
Posted in Uncategorized | 3 Comments »
