protected function number($number) {
        if (trim($number) === '') {
            return '';
        }
        $numbertext = '';
        if (trim($number) === 'i') {
            $numbertext = get_string('information', 'question');
        } else {
            $numbertext = get_string('questionx', 'question',
                    html_writer::tag('span', $number, array('class' => 'qno')));
        }
        return html_writer::tag('h3', $numbertext, array('class' => 'no'));
    }