Harold,
Kids do not like rules. That's why many Math books have instruction book for the teacher (separate edition to include rules). My DD won't read them.
Most gifted students will cruise through problem solving Math questions (without bothering the parents and sometimes we are amazed that they can do questions that we were quite sure above their capability including long and complex questions). There are many word problems today than years ago. So far, my favorite has been Math for gifted kids by flashcards and primary grade challenge Math by Edward Zaccaro. If my DD wants more, I'll probably try yours as well.
But keep writing and publishing Math word problems. The more choices, the better for us. (I would not have posted the way you did though). :-)
