1 JANUARY 1960, Page 24

S1R,—Tw0 comments on the Christmas quiz.

-II, 13, 19, 29 is also an arithmetical progressio. with numbers going up by 2, 6, 10, 14, etc., and Ill snooker, if one starts with a foul, one's opponents, given a free ball, may in his break score a maximua of 155, not 147. This latter number has been unquer tionably attained by five players, including Joe Davi who holds the official world record of 146.—Yours faithfully,

12 Marmion Road, SIV I