Okay, I would run the survey in group-by-group mode,
set up the survey to use JavaScript and place the following script in the source of each group description. Replace"NN" (line 5) with the number of questions you want displayed in each group (page).
The script initially hides all questions on a page and then shows the first number of questions you want, Since the questions are already randomized on the page, you effectively get random sub-sets of questions for each respondent.
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
showQuestions(NN);
function showQuestions(showNum) {
$('div[id^="question"]').hide();
$('div[id^="question"]').each(function(i) {
if (i < showNum) {
$(this).show();
}
});
}
});
</script>
