ENIGMA 861
TOM, Dick, Harry, Anne and Belinda are on holiday together on the island of Alvbe [Ars Longa Vita Brevis Est], where it is the custom to celebrate diversaries [rather than anniversaries] of everything 鈥� and particularly of one鈥檚 birth.
Today Tom is celebrating a palindromic diversary of his birth. 鈥淗appy prime diversary鈥�, says Anne. 鈥淎nd tomorrow you鈥檒l be twice a prime,鈥� says Dick. 鈥淎nd the day after tomorrow you鈥檒l be three times a prime,鈥� says Belinda. 鈥淎nd the day after that you鈥檒l be four times a prime,鈥� says Harry.
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So, how old is Tom today (in, of course, days 鈥� the number of days since his birth)?
A 拢10 book token will be awarded to the sender of the first correct answer opened on Thursday 14 March. The Editor鈥檚 decision is final. Please send entries to Enigma 861, New 杏吧原创, King鈥檚 Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 854 was D. Vincent of Watford, Herts. and the winner of Enigma 855 was Charles Pochin of Havant, Hants.
Answer to Enigmas
854 and 855
Colourful Christmas and Magic moment
854: They can produce (ii) but not (i) and (iii).
855: 25 February.