Following up my previous message, here is an example:

%% begin shuffled list of exercises
\setuprandomize[2021]

\startluacode
        function shuffle(tableau)
                local maxsize, t, tt
                maxsize = #tableau
                tt = {}
                t = {}
                for i = 1, maxsize do
                        t[i] = {}
                        t[i]["columnOne"] = tableau[i]
                        t[i]["columnTwo"] = math.random(1,100*maxsize)
                end
                table.sort(t, function(a,b) return a.columnTwo < b.columnTwo 
end)
                for i = 1, maxsize do
                        tt[i] = t[i]["columnOne"]
                end
                return tt
        end
\stopluacode

% We define three arrays
% with the names, the functions and their derivatives
% One could also add a ListOfVariables...

\startluacode

        ListOfNames = {
                "f",
                "g",
                "h",
                "u",
                "v",
                "F",
                "G",
                "H",
        }
        
        ListOfFunctions = {
                "\\cos(x^2)",
                "x\\sin(x)",
                "\\tan(x)",
                "x^3 - 3x^2 + 1",
                "\\frac{1}{1 + x^2}",
                "\\sin(\\log(x))",
                }
                
        ListOfDerivatives = {
                "-2x\\sin(x^2)",
                "x\\cos(x) + \\sin(x)",
                "1 + \\tan(x)^2",
                "3x^2 - 6x",
                "\\frac{-2x}{(1 + x^2)^2}",
                "\\frac{\\cos(\\log(x))}{x}",
                }
                
\stopluacode

\starttext

% We define a buffer and a shuffled list of integers

\startbuffer[test-derivatives]
\startluacode
        ShuffledList = shuffle({1,2,3,4,5,6})
\stopluacode

Let $\cldcontext{ListOfNames[ShuffledList[\recurselevel]]}(x) := 
\cldcontext{ListOfFunctions[ShuffledList[\recurselevel]]}$. Prove that
\startformula
\cldcontext{ListOfNames[ShuffledList[\recurselevel]]}'(x) = 
\cldcontext{ListOfDerivatives[ShuffledList[\recurselevel]]}
\stopformula
\stopbuffer
        
\dorecurse{6}{\blank[medium]{\bf Exercise #1.}
        \getbuffer[test-derivatives]
        }

\stoptext

%% end shuffled list of exercises


> On 6 Jan 2021, at 09:41, Otared Kavian <ota...@gmail.com> wrote:
> 
> Hi Jairo,
> 
> One can indeed make quizzes and exams with randomized order of problems, 
> randomized values and even randomized names of functions and variables.
> I have some examples which I have been using for several years (they are 
> useful especially in these days of giving exams onlineā€¦): I can send them to 
> you as they are, or if you tell me what kind of problems you want, then I can 
> adapt my examples before sending them to you.
> 
> Best regards: Otared 
> 
>> On 5 Jan 2021, at 17:18, Jairo A. del Rio <jairoadelr...@gmail.com> wrote:
>> 
>> Hi, list.
>> 
>> Some time ago I realized ConTeXt has "blocks" which allow one to make 
>> quizzes, exams and related with ease. However, I want to know if there's an 
>> option to randomize their order when printed. Thank you in advance.
>> 
>> Jairo
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to 
>> the Wiki!
>> 
>> maillist : ntg-context@ntg.nl / 
>> http://www.ntg.nl/mailman/listinfo/ntg-context
>> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
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>> ___________________________________________________________________________________
> 

___________________________________________________________________________________
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Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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