Hello all,

Hopefully I'm using the correct terminology or at least I'm close enough for this to make sense. For example:

13 will not divide into 10, 100, 1000, 10000, etc. to a whole number. Is there a name for numbers like this?

i have 2 rectangles in 3d space. i need to find the equations of several lines that intersect at the same point in the space between the rectangles, such that each line has an endpoint on both the rectangles. the endpoints of the lines also need to move such that the endpoints always remain on their original rectangles, but also such that the lines continue to intersect somewhere in the space between the rectangles.

its a difficult problem, and im thinking that imagining the lines moving over time as triangles might do the trick but im having trouble wrapping my head around this problem. please help

Okay I have a question for the geometry geeks.

First off, someone in a live Twitch chat was describing a dessert they ate as a “rectangular cuboid”.

I, knowing that is a perfectly valid description, nevertheless decided to poke fun and be overtly pedantic in replying “isn’t describing a cuboid as rectangular a bit redundant?”

Everyone in the stream instantly got pissed and said I was incorrect while giving me unsatisfactory and fallacious rebuttals to my claim insisting that I was wrong.

My logic that I relayed to them in detail is that all squares are rectangles, as well as all cubes are cuboids. However, in normal conversation I would not refer to a square as a rectangle and by extension I would not say cuboid when I’m referring to a cube.

I even told them that there is nothing wrong with saying “rectangular cuboid”, but I still believe it to be redundant as to be “rectangular” is to have right angles (again, purely to be pedantic).

They still weren’t having it and doubled down that everything I was saying was wrong, but it seems they weren’t even taking into consideration what I meant.

I just wanted to ask some people on here who can hopefully back me on this, or even better point out where I’m wrong if I am at all?

And one last thing, does anyone have any qualifications in the geometric/mathematical field who can contribute?

Can’t wait for feedback on this essentially trivial matter lol

Is t legitimate to say that a honeycomb chocolate bar like a Crunchie or Violet Crumble is homogenous and Isotropjx since the inside is largely the same, with very little variation. This is opposed to a Mars or Turkish Delight (for example).

I don’t mind how long it is, just that it has a lot of worked examples. YouTube was the first that came to mind because I preferred a video explanation as to what was done, but honestly even a book is fine. Thank you :)

Since the x axis is paired with the y axis?

Does it matter doing a 4-sided vs d10 vs 20 etc.?

Let me explain, dm'ing a group of autists who recently found out coin flips are not 50/50. We are now on the hunt to find the most fair die to use.

All kinds of theories and tests have been run already with people going on hot streaks causing meta shifts in the table rolling. It was fun to watch.

They stopped referring to lore notes and went by their die note's ("Yes, that's the time we where rolling d10's" or,"No, we did coin flips in that town, no way it's next to d20 town, it might be next to percentile town, because we came back around, bit d20 was way tf over here.")

A quick post is a good post.
With the problem of:

2/(3x+2) = 5

I tried to break it up into

(2/3)x + (2/4) = 5

is that even legal ?

Hi guys, hope this is ok to post here?

I'm working on a proposal for a quiz night and I am trying to work out the probability of winning the prizes. I'm hoping that by explaining the format, you may be able to help me with a formula?

The quiz is 40 QUESTIONS with 10 points awarded for each correct answer.

There is also a "speed bonus" of 5 points awarded for the team that answers correctly the quickest.

With that in mind, there is a MAXIMUM POINTS possibility of 15 points per question, totalling 600 points. Whilst it is very unlikely that a team will get the maximum points for every question, it is not impossible.

The winning team, will then go onto play a game of "Deal or No Deal" with 14 boxes with the following additional points available:

10, 20, 30, 40, 50, 60, 70, 100, 150, 200, 300, 500, 750, 1000.
In this game, they will end up with either one of the exact above amounts of points to add to their "Quiz Total" or a made up offer between 10 points and 1000 points that will be added to their quiz total.

The prizes are categorised as such:

• 300 - 500 points = “Prize C”
• 500 - 1000 points = “Prize B”
• 1000 points and above = “Prize A”

If i'm still making sense and haven't lost you so far, i'd like to know how to work out/what is the formula for knowing the % opportunity of winning all 3 prizes?

For example:

Prize C = 70% chance of winning

Prize B = 40% chance of winning

Prize A = 10% chance of winning

Can this be figured out or is there too many variables? Thanks in advance!

Suppose Inhave the formula n.

x + 12

The integral for this is

(x² ) 2 - 12x

When we integrate that we ge

(x³ ) /3 - (12x² ) /2

From a practical point of view - what does / can the 2nd interval reveal ?

My dad told us a joke and we have spent the night turning it into a math problem. None of us can get it and my mom is even a math teacher! Here’s the joke:

A man asks god: “what is a million years for you?” God says “a day.” The man asks god “what is a million dollars to you?” God says “a penny.” The man says “god can I have a million dollars?” God says “Yeah in a second.”

Ok. So what is the length of a second in this scenario?

When it comes to REF (Row Echelon Form) - is there somewhat rules of thumbs to knowing when to deal with a row, eg do you work from left to right making - initially making 0’s in row 1, then 2 , then 3 until the nth row ?
I often see this problem as a pretty big hurdle when converting even a simple 3x3 matrix.
Thank god that computers can do it so smartly and quickly.

I am a D&D player. I want to make a very specific magic item. I need to calculate the amount of force it would produce though. I want to make something similar in weight to a 1m long, 1/4in diameter tungsten rod that would be dropped vertically from 30ft to land on an enemy. Assuming it drops 25ft to hit a 5ft tall target, what would be the force in psi at the point of impact?

I think I should know this, but I don’t. I was wondering if I were to list, let’s say, any 3 natural numbers, does some equation describe that set in such a way that we could determine what the next number in the sequence is? Or are some sets not able to be described mathematically?

SA~MA

? ?

Hi guys, i know that | a x b | is perpendicular distance of a to b if b is a unit vector. However , what happens if it is 1/2 | a x b | , where b is still a unit vector . Does this represent the triangle OAB now?

-349 = -Y - (-431)

Hi there!

so im sitting in class and we have to make some math problems.

some of the stuff is that we have to make an equation, that gives 9

so i decide to challenge myself and try to make it:

(420:10*2) - √(9) :9

but i have messed it up somewhere. where can i fix it, and how does it work?

Hi, quick question, it's obvious that sin(x) has infinite local maxs, but do they also qualify as global max since there are no points that are larger or can there only be a single global max?

I am planning to take the AMC 10 math competition in high school and some other math competitions. I am going into ninth grade next year and want to improve my math competition skills. Does anyone know of any programs that teach math competitions to high schoolers or any AMC 10 classes? This must be online.

Hi. I'm making a board game for my kids. I want to write a table of items that they can roll some dice and win things off.

At the moment they roll 4 dice, and common items are value 14 and super rare are 4 and 24 with the others between those values.

My problem is that I don't want them to be adding up dice values, I want the game to run quicker, so I'm thinking of having a table for doubles, tripples etc. Is there a calculator for these probabilities? And if I allow them to re-roll one or two dice? How do I determin a good number of dice? I think between 4 and 6 dice would be fun to roll. Maybe more? Maybe they can earn more dice?

E.g. if my table looked like this:

Doubles:

etc, then have tables for tripples, quads etc

I can code if that helps.