E. Thomas & Williams, Aberdare. 4 Winners from 1980 to 1986 from Cross Bychan (2x), Mount view, Aberdare Con club. a classic riddle where you must solve the puzzle without sight. To solve it, divide the 100 coins into two piles: one pile with all 10 of the heads-up coins, and another with the remaining 90 tails-up coins.
