Health warning:


If, in the above sum, each different letter represents a distinct digit from 0 to 9, what is the value of COD?

A prize of the Chambers-Larousse Desk Reference Encyclopedia awaits the sender of the first correct answer opened on 10 April. Entries to: Saturday Pastimes, the Independent, 1 Canada Square, Canary Wharf, London E14 5DL.

16 March competition:

The dates that cannot be turned into sums are 2.4.96, 3.4.96, 4.4.96, 8.4.96 and 9.4.96. Of the others, the one that caused most trouble was: 20-4+9=6. All the dates are possible if square roots and factorials are allowed.

Winner: Paul Peters (Cheltenham).