Answer the questions, reveal the letters, answer the rest of the questions you didn't get first time round! Either that or get them all right straight away and impress everyone.
OK, what you do in this case is (1) go to Step 3 - Quiz Design; (2) switch Mode from the current default of Auto to Manual, then (3) for each letter in the left hand column, highlight it, then from the drop-down box choose Answer Component (Hidden) and click the same letter from the menu that will appear. When you've done that for every letter, do the usual Save Quiz followed by Step 6 - Submit. Cheers, Jeremy