. , , . . : 1- 10 : 1x2 1 2 1. , 3. 1x3, 500 2x2. 11- 20 : / 11, 13, 15, 17, 19 . 1x2 5 1x3 21- 25 : (0, 5)1x2 1. . .
"" ! (10 . ), , . , . "- ", . .