code: protected function getQuestion()
  	{
  		$this->generateCaptcha();
  
  		$question = $GLOBALS['TL_LANG']['SEC']['question' . random_int(1, 3)];
  		$question = sprintf($question, $this->arrCaptcha['int1'], $this->arrCaptcha['int2']);
  
  		$strEncoded = '';
  		$arrCharacters = Utf8::str_split($question);
  
  		foreach ($arrCharacters as $strCharacter)
  		{
  			$strEncoded .= sprintf('&#%s;', Utf8::ord($strCharacter));
  		}
  
  		return $strEncoded;
  	}
docs: Generate the captcha question
  
  @return string The question string