Riddle : WHAT IS THE 7TH LETTER OF THE ALPHABET? ANSWER EXPLAINED! This word-based riddle is seemingly simple but a bit tricky. Short Answer : E is the 7th letter of the ALPHABET. Explanation: So, you think you know the answer right? It's 'G' doesn't it ? Well you're wrong like many of us. The real answer is 'E' because the riddle is actually asking you what is the 7th letter of the word ALPHABET is. A,L,P,H,A,B,E,T. The 7th letter is E. We bet you're really kicking yourself now!