Diggory Venn - , . . , , .
1 (2, 3, 4, 5)(6, 7, 8, 9) . : 88 (96, 106, 116, 126)(134, 144, 152, 160) c 10 c . 20 x 28 = 10 c .
: 2_5399994387633558193.pdf