Buddy @12. Last week's Listener was a numerical crossword. I'm not actually sure what the constraints are on composing one, but it seems that the entries are numbers. I don't know what the rules are for the clues. In the two Listeners I've done the clues have been algebraic expressions. I just sort of threw out the challenge for fun because mattrom commented about it after last week's WPR. Curious to see what all you clever folks would come up with.