Magic Roundabout (High Wycombe) Magic Roundabout (High Wycombe) The Magic Roundabout in High Wycombe, Buckinghamshire, England, is similar to the roundabouts with the same name in Swindon and other places. It is located on the junction of the A40 and A404. The junction is the second meeting point of the two roads, they interchange at the start of the A404 in Marylebone, London, with the A40 forming the Westway. The two roads follow different routes to reach Wycombe, the A40 coming via Beaconsfield and the A404 via North London and Amersham. From the roundabout, the A40 continues towards Oxford, Cheltenham, Gloucester and South Wales,
Magic circle (mathematics) Magic circle (mathematics) Magic circles were invented by the Song dynasty (960–1279) Chinese mathematician Yang Hui (c. 1238–1298). It is the arrangement of natural numbers on circles where the sum of the numbers on each circle and the sum of numbers on diameter are identical. One of his magic circles was constructed from 33 natural numbers from 1 to 33 arranged on four concentric circles, with 9 at the center. Yang Hui's magic circle series was published in his "Xugu Zhaiqi Suanfa"《續古摘奇算法》 (Sequel to Excerpts of Mathematical Wonders) of 1275. His magic circle series includes: magic 5 circles in square,