Count number usage check

Why is this one working,
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and this one with the count number usage only working part of the time?
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Would you be able to provide a link to the activity?

Also, need the link, but a few efficiency suggestions:

  1. You don’t need to use numericValue("1") you can just use 1.
  2. You can just use the value variable to define your text:
    Text= `${value}`
  3. result = when value=1 or value=2 "Correct!" otherwise "Incorrect."
    (since value is defined by g.number("N") anyway).

I’ll link it. Just FYI, eventually I will be working with fractions and decimals and ‘n’ and the text and the values will all be different. When I get frustrated working with the code, I try to break it down to the most simplistic form so I can get it to work, and then can easily add in the more complicated pieces as needed. Well complicated for me.

FDP Practice • Activity Builder by Desmos

I think it’s not working because submitting changes the variable, P_{ress}, but I’m not sure. You might need to use a capture, but it’ll only capture numericValues not latex.

What is your objective here? That might help discover an alternative solution. For example, when I want randomized questions, rather than randomizing “on the fly”, I generate a random list(s) of values for problems and then just compare current values to the list. If I have this issue of countNumberUsage evaluating the next value, I just have to change which element in the list it checks.

Here’s a kind of busywork example:

1 Like

Yeah that’s exactly what is happening. Thanks for the example!

I realize that particular example was quite a bit more work than some others. I’ll have to find a better one.

Nuts, I ran into this problem before with a distributive property practice activity. It was recommended to try using pattern matching, but I couldn’t figure it out for that activity and went in a different direction.
Does anyone have a pattern matching activity with fractions and decimals I can see as an example?

For a decimal, you could just use numericValue and countNumberUsage.

countNumberUsage(input.latex)=1

The above for example would just make sure only one number was used. Maybe this recent fraction question thread might be somewhere to start? Also, @Jay has a youTube video that covers fraction patterns.

Hm, nvm, that was a thread on matching equivalent expressions. The one I was remembering also used capture history to correct the problem.
Now that I understand the problem…
If I wanted to have a list of randomly generated problems, using say n=1 through n=5, that reset each ‘n’ with a button, then I have to use the capture previous on a numeric value to compare the answer to when the button is pressed. Or, I have to use a separate button to check an answer with latex, and then have a new problem generated with a different button. Yes? I think I get it.

The point of using a list of randomly generated problems is to just cycle through the list, so you would just use the submitCount/pressCount to move through the elements of the list. You could potentially check latex using elements from a list. A fraction, for example, you’d need a list for numerators and denominators, and I usually set variables for the values of the current problem (or last if needed for checking purposes), then use something like:
In graph:

Num= graph.number(`n_C`)
Den= graph.number(`d_C`)
check= input.latex=`\frac{ ${Num} }{ ${Den} }

I’d have a variable set in the CL for the submit count (say p), then define n_C and d_C as the p+1 element of the numerator and denominator lists:

n_C= N[p+1]
d_C= N[p+1]

I totally have it working now. Thank you for all your help.

Curious though, is there a way to have the random generator change on the `Edit my response’ click? It happens after pressing submit so it wouldn’t change my correct result.

I’m not sure if it does so. I have a tendency to use tables and usually make separate buttons for checking and cycling to new questions. That also means you have to code checks for each cell (though it’s usually a copy paste, or Alt+click/drag situation). It also allows my students to skip questions and go back to them though.