Dun mean to be crude...but selwyn your riddle sux!
Anyway, i dun think it even qualifies as a riddle coz the definition of a riddle is

1) A question or statement requiring thought to answer or understand; a conundrum.
2) One that is perplexing; an enigma.

The statement u posted required no thought to understand and it did not perplex me...so i think it is just a "qn" whose definition is

1) An expression of inquiry that invites or calls for a reply.
2) An interrogative sentence, phrase, or gesture.
3) A subject or point open to controversy; an issue.

A riddle will be something like this:
In a stable there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable?