public function getTestQuestion()
{
$expr = $this->questionDefn->question;
$expr = $this->substituteValues($expr);
$question = MathFuncs::cleanUp($expr);
$expr = $this->questionDefn->answer;
$expr = $this->substituteValues($expr);
$answer = $expr;
$numSolutions = count($this->solutionArray);
for ($i = 0; $i < $numSolutions; $i++) {
$soln = $this->solutionArray[$i];
$soln = $this->substituteValues($soln);
$this->solutionArray[$i] = $soln;
}
$problem = new Question($question, $answer, $this->questionDefn->solutionFn, $this->solutionArray, $this->questionDefn->flags);
$problem->templateId = $this->questionDefn->templateId;
return $problem;
}
public static function reduce($numerator, $denominator)
{
$lcm = MathFuncs::lcm($numerator, $denominator);
$denominator /= $lcm;
$numerator /= $lcm;
if ($denominator != 1) {
return "{$numerator}/{$denominator}";
} else {
return $numerator;
}
}
