The question 1: 1 is the cubic of 1, 8 is the cubic of 2, and so on.

Second question: 4 = 1× 3+ 1, 13 = 4× 3+ 1, () = 13× 3+ 1 = 40,/kloc-.

The third question: 2 = 1× 3- 1, 5 = 2× 3- 1, () = 5× 3-1=14,41=/kloc.