Examples for multiple choice questions - exactly one correct choice


\begin{question} % start of question 
      \text{choices: permutechoices; corrector:fixed}
      \explanation{See explanation presented in the lecture}
      \permutechoices{1}{3} % determine a random order of questions 1,2 and 3
      \type{mc.unique} % There is always only one correct answer

      \begin{choice}
            \text{-5 = -5}
            \solution{true} % This answer requires a yes
      \end{choice}

      \begin{choice}
            \text{5 = \sqrt{-25}}
            \solution{false} % This answer may not be selected
       \end{choice}

       \begin{choice}
             \text{5 = -5}
             \solution{false} % This answer may not be selected
       \end{choice}
\end{question}

% There is always only one correct answer
\begin{question} % start of question 
      \text{variables:numbers, functions; corrector:fixed }
      \explanation{}
      \type{mc.unique} % There is always only one correct answer

      \begin{variables}
            \function{f}{a+b} % defines a function named f
            \number{a}{1}
            \number{b}{2} % defines a number b
            \number{c}{3}
            \number{d}{4}
            \number{e}{-1}
      \end{variables}

      \begin{choice}
            \text{$f$ = $c$}
            \solution{true} % This choice is true.
      \end{choice}

      \begin{choice}
            \text{$f$ = $d$}
            \solution{false} % This choice is false
      \end{choice}

      \begin{choice}
            \text{$f$ = $e$}
            \solution{false} % This choice is false
      \end{choice}
\end{question}

% There is always only one correct answer
\begin{question} % start of question 
      \text{variables:randint, functions; corrector:fixed}
      \explanation{}
      \type{mc.unique} % There is always only one correct answer

      \begin{variables}
            \randint[Z]{b}{6}{12}
            \randint[Z]{a}{0}{5}

            \function{f}{a+b}                               
            \function[calculate]{f_result}{a+b}

            \function{g}{a-b}
            \function[calculate]{g_result}{a-b +1}

            \function{h}{a*b}
            \function[calculate]{h_result}{(a+1)*b}
      \end{variables}

      \begin{choice}
            \text{$f$ = $f_result$}
            \solution{true} % This choice is correct
      \end{choice}

      \begin{choice}
            \text{$g$ = $g_result$}
            \solution{false} % This choice is wrong
      \end{choice}

      \begin{choice}
            \text{$h$ = $h_result$}
            \solution{false} % This choice is wrong
      \end{choice}
\end{question}

\begin{question}
      \text{variables:randint, randadjustIf; corrector: solution{compute},iscorrect}
      \explanation{Both expressions must have a common denominator before you compare them.}

      \permutechoices{1}{2}
      \type{mc.unique}
      \field{real}

      \begin{variables}
            \randint{a}{1}{25}
            \randint{b}{2}{35}
            \randint{c}{3}{45}
            \randint{d}{4}{55}

            % If you randomize variables, it could happen, that the random values do not
            % satisfy the conditions in the question and have to be adjust.
            \randadjustIf{a,b,c,d}{a<b OR c=d } % see Part 9 http://team.mumie.net/projects/support/wiki/GenericTexProblems 
      \end{variables}

      \begin{choice}
            \text{\frac{$a$}{$b$} < \frac{$c$}{$d$}}
            \solution{compute}
            \iscorrect{a/b}{<}{c/d}
       \end{choice}

       \begin{choice}
             \text{\frac{$a$}{$b$} \ge \frac{$c$}{$d$}}
             \solution{compute} % the correct answer will be calculate automatically. 
             \iscorrect{a/b}{>=}{c/d} %The use of an additional \iscorrect command is required
       \end{choice}
\end{question}

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