Å®ÉúСÊÓƵ

In-laws

Four pairs of siblings were great friends right through school and eventually the eight (all mentioned below) paired off in man-woman partnerships and got married. They had no other siblings.

Alan has two brothers-in-law, Brian Long and Eleanor Short’s husband. Fiona has no sisters-in-law. Mrs Tall’s brother Colin states that his sister-in-law’s sister’s sister-in-law is Geraldine. Hannah’s sister-in-law’s brother’s sister-in-law is married to David.

Name the four married couples (eg: you might have Alan and Eleanor Long, and so on).

WIN £15 will be awarded to the sender of the first correct answer opened on Tuesday 12 April. The Editor’s decision is final. Please send entries to Enigma 1637, New Å®ÉúСÊÓƵ, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1631 The number atop Joe’s pyramid is 98

The winner Martin Hooper, Burton upon Trent, Staffordshire, UK