Home › Mathematics › The Canterbury Puzzles › 108 — Plato and the NinesThe Canterbury Puzzlesby Henry Ernest Dudeney232 of 238 · Contents · Download EPUB108 Plato and the Nines The following is the simple solution of the three nines puzzle:— 9 + 9——.9 To divide 18 by.9 (or nine-tenths) we, of course, multiply by 10 and divide by 9. The result is 20, as required. ‹ Previous107 — The Four PrincesNext ›109 — Noughts and Crosses123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238← Back to The Canterbury Puzzles