Click to follow
Trial and error:

"Nothing odd about it," said the judge. "If OJS times OJS equals GUILTY... er... perhaps I'd better rephrase that. What we're looking for is an even number with three digits, no two of which are the same, which, when squared gives a six-digit number, no two digits of which are the same, or coincide with any of the digits of the original number."

Can you find a number fitting the judge's description?

A copy of Chambers Encyclopaedic Dictionary will be awarded to the sender of the first correct answer opened on 19 October. Entries to: Saturday Pastimes, the Independent, 1 Canada Square, Canary Wharf, London E14 5DL.

23 September answers: trains (They go on RAIlway liNeS); station (a STop on A TraIn jOurNey); ticket (show ThIs Card to maKE a Trip) Winner: Mrs Julia Wilson (Halifax).