考虑等式(43) x =(y3) 8 ，其中x和y是未知的。可能的解决方案数是________。
(A) 3
(B) 4
(C) 5
(D) 6答案： (C)
解释：
3 + 4x = 3 + 8y where 0 <= y = 5 (because the number represented in base x is 34)
x = 2y and 0 <= y <= 7
The following are possible solutions
y = 3, 4, 5, 6, 7
x = 6, 8, 10, 12, 14这个问题的测验