Get Class of TD

HTML

<div class="test">Clicking This Hides First Item</div>
<br><br>
<div class="poo">Clicking This Hides All Other Items</div>
<br><br>
<div class="testQuestion">This should hide</div>
<br><br>
<div class="testBiddyBiddyBum">This should hide</div>

JavaScript

$('.test').click(function() {
    var myClass = $(this).attr('class');
    $("."+myClass+"Question").hide();
    })
    
    
    $('.poo').click(function() {
$( "div[class*='test']" ).hide();
    })