<%= simple_fields_for 'question', @questions do |f| %>

Number Prefix	Number Suffix
<%= f.input :prefix, :label => false %>	<%= f.input :suffix, :label => false %>

<%= f.simple_fields_for :answers, @questions.answers.first do |a| %> <%= a.hidden_field :text %> <% end -%> <% end -%>
Hint: affects how the number will be shown.
E.g. the number 60 could be shown as follows:

Number Suffix	Number Prefix	Shown as
$	USD	$60 USD
	Months	60 Months
	Inches	60 Inches