81 | 3 (81 : 3 = 27)
27 | 3 (27 : 3 = 9)
9 | 3 (9 : 3 = 3) 81 = 3х3х3х3
3 | 3 (3 : 3 = 1)
1 |
--------------------------------------------------------------------------------------------
125 |5 (125 : 5 = 25)
25 |5 (25 : 5 = 5)
5 |5 (5 : 5 = 1) 125 = 5х5х5
1 |
Легкотня
10- 1
11- 2
12-3
13-3
14-3
15-1