Dynamically get radio button group name using jQuery

Something like the following should work:

$('input').click(function() {
    var thisName = $(this).attr('name');
    var qNum = thisName.substring(1);
    var ans2 = $('input[name=' + thisName + ']:radio:checked').val();
    getUserAnswer(thisName, ans2);
});

$('input:radio').click(function() { 
  console.log($(this).attr('name')); 
}); 

You are selecting new set of elements on click, but you need the attr of the current element so, you need to refer to it with 'this'