Subversion Repositories wimsdev

type=first

textarea="explain"

random="a b c d"

computed="ans"

:A numerical exercise with 4 random parameters.

The numeric reply is computed with respect to random values of 4 parameters,

according to various formulas.

<p>

Author of the model: Gang Xiao <qualite@wimsedu.info>

:%%%%%%%%%%%%%%%%%      ATTENTION      %%%%%%%%%%%%%%%%%%%%

Remove the above header if you destroy the model tags i.e.the lines starting

with a ':'. Otherwise the exercise might not be recognised by Createxo.

:%%%%%%%% Example parameters to be redefined %%%%%%%%%%%%%%%%%

:\title{Four parameters}

:\author{XIAO, Gang}

:\email{qualite@wimsedu.info}

:\credits{}

:First parameter \a.

\real{a=randint(-20..20)}

:Second parameter \b.

\real{b=randint(-20..20)}

:Third parameter \c.

\real{c=randint(-20..20)}

:Fourth parameter \d.

\real{d=randint(-20..20)}

:The computed correct answer.

All common functions are recognized. We use \a, \b, \c, \d to

designate the random parameters defined above.

\real{ans=(\a)*(\d) - (\b)*(\c)}

:Text that explains what should be done.

Note that the syntax \(...) shows a mathematical formula as it should be.

$embraced_randitem

\text{explain=

Compute the determinant of the matrix \([\a,\b;\c,\d]).

}

:%% Computations; do not modify

\text{explain=wims(embraced randitem \explain)}

:%%%%%%%%%%%%% Now the statement in html. %%%%%%%%%%%%%%%%%%%%

::You don't need to modify this in general.

\statement{\explain

}

:%%%%%%%%%%%%% Nothing to modify after. %%%%%%%%%%%%%%%%%5

\answer{My reply}{\ans}{type=number}