Unordered Answers

Answers can be entered in any order into answer blanks

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Complete Code

Download file: UnorderedAnswers.pg

POD for Macro Files

PG problem file

Explanation

DOCUMENT();

loadMacros('PGstandard.pl', 'PGML.pl', 'unorderedAnswer.pl', 'PGcourse.pl');

Preamble

The macro unorderedAnswer.pl must be loaded.

Context()->variables->add(y => 'Real', z => 'Real');

$a = random(2, 9);

$answer1 = Compute("x^$a");
$answer2 = Compute("y^$a");
$answer3 = Compute("z^$a");

Setup

Because the answers have the variables x, y, and z, add the latter two.

BEGIN_PGML
Rewrite the following expression without parentheses. Simplify your answer as
much as possible.

[`(xyz)^{[$a]} =`] [_____] [`\cdot`] [_____] [`\cdot`] [_____]
END_PGML

Statement

This is the problem statement in PGML. 
$showPartialCorrectAnswers = 0;

UNORDERED_ANS($answer1->cmp, $answer2->cmp, $answer3->cmp);

Answer

We use UNORDERED_ANS(checker1, checker2, ...); to evaluate the answers. It is possible to withhold feedback and credit until everything is correct by using the standard problem grader, which awards no partial credit and full credit only when everything is correct.

BEGIN_PGML_SOLUTION
Solution explanation goes here.
END_PGML_SOLUTION

ENDDOCUMENT();

Solution

A solution should be provided here.