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visits member for 3 years, 8 months
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Applied Mathematics degree with Computer Science.


Jun
17
answered Area puzzle in colored triangle
May
17
awarded  Constituent
May
10
comment proof using pigeonhole principle
Playing devil's advocate, I want to pair each odd number with an even numbers and each even number with an odd, to keep the differences odd, thus the product odd. Can I do that with $\frac{n-1}{2}$ even numbers and $\frac{n+1}{2}$ odd numbers?
May
7
awarded  Caucus
Apr
12
comment How to determine the difference Onto vs One-to-one?
Is liking toast and jam enough reason for a +1?
Apr
9
comment Infinite sets don't exist!?
The author doesn't seem to argue that mathematicians can construct numbers like this, but takes issue that this construction requires more materials than exist in the universe, even on an atomic level. I don't need infinite sets to do that, just let $x = $ the number of atoms in the universe $+ 1$.
Apr
9
comment Infinite sets don't exist!?
From the article - "Mathematics that makes complete sense tends to parallel the real world and be highly relevant to it". But according to Einstein, "As far as the laws of mathematics refer to reality, they are not certain; as far as they are certain, they do not refer to reality."
Feb
25
awarded  Popular Question
Jan
31
comment Unusual 5th grade problem, how to solve it
An excellent idea. Cutting out fractions of a unit circle and passing them to the class to put back together in different ways would work really well!
Dec
7
comment Scale of 0-1 change it to 1-180?
Let $x \in [0,1]$. Then $y = 179x+1$.
Aug
28
comment Why did my friend lose all his money?
Roulette tables have a zero and a double-zero, to give the casino its only mathematical advantage. Are you sure this answer true for the MUD as given? Keep in mind, one wasn't given.
Aug
17
comment Need algorithm to take “max” of scores, but with “quality” weighting
Need it be complicated? I would weigh each test so that I could multiply their score by its weight. Take the maximum value of the weighted scores and see if it is higher than the target value to determine success or failure. This is akin to giving the tester a few points for taking a harder version of the test, however, and I'm not sure if I understand the objective completely...
Aug
1
awarded  Yearling
Jul
31
comment Solving $5^n > 4,000,000$ without a calculator
cough typo cough
Jun
22
revised Evaluating $\frac{1}{\sqrt{4}+\sqrt{6}+\sqrt{9}}+\frac{1}{\sqrt{9}+\sqrt{12}+\sqrt{16}}+\frac{1}{\sqrt{16}+\sqrt{20}+\sqrt{25}}=?$
Added approximation.
Jun
22
answered Evaluating $\frac{1}{\sqrt{4}+\sqrt{6}+\sqrt{9}}+\frac{1}{\sqrt{9}+\sqrt{12}+\sqrt{16}}+\frac{1}{\sqrt{16}+\sqrt{20}+\sqrt{25}}=?$
Jun
22
comment What is the total number of combinations of 5 items together when there are no duplicates?
I think this is the most intuitive way to formualate the solution, and the $2^n$ formula is more natural than when presented in @JBC's answer.
Jun
21
comment Probability of picked card being a spade or ace
If the deck is well-shuffled, any card can be in any position with equal probability. Therefore any card can be in the $25+14$th position with equal probability... Is there something I'm missing?
Jun
19
comment What is the usefulness of matrices?
Services like Netflix store information in matrices. When it is deciding what movies to recommend to you, it compares your movie matrix with ones 'similar' to yours, and recommends movies that other users with your preferences also enjoyed. Determining 'orthoganality' is one of the topics you will likely cover.
May
11
comment Issues with text problems
So both the problem and the solution lie within the education system... It is good to know that students are not required to actively participate.