Josie Henson, Author at New ĐÓ°ÉÔ­´´ Science news and science articles from New ĐÓ°ÉÔ­´´ Sat, 14 Jan 1995 00:00:00 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.1 242057827 Enigma: No 805 A prime year /article/1834550-enigma-no-805-a-prime-year/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Sat, 14 Jan 1995 00:00:00 +0000 http://mg14519605.600 I WAS recently filling in a passport application for my family and in writing down a particular year of birth for one of them I included an extra digit in error. The passport officer rejected the form but the quick-witted clerk noted that the five-figure “year” which I had written was a palindromic prime. Interestingly, the same was true if the form was read upside down.

What year had I intended to write?

A ÂŁ10 book token will be awarded to the sender of the first correct answer opened on Thursday 16 February. The Editor’s decision is final. Please send entries to Enigma 799, New ĐÓ°ÉÔ­´´, King’s Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 799 was Trevor Monk of Chepstow, Gwent.

Answer to Enigma 799

Going to great lengths

20 metres.

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