If you are in a blog (or in moodle (eitOnline for some)), you can hide answers to questions on the same page. By making the text colour the same as the background or background color the same as the text.
In moodle (eitOnline) thats easy as its on the toolbar, in WordPress (eduBlog) you need to go into the code, locate the font tag around what you want to hide and make it look like...
*<font color="white">Your answer </font>*
and add some instructions.. for example..
To do that click and drag your mouse from star to star.
* Hello ... *