^^求助大家几道GWD数学题~~~~

窝棚里的沙发

有几个题自己没有想太明白 希望大家能帮忙

1 How many integersfrom 0 to 50, inclusive, have a remainder of 1 when divided by 3 ? 我觉得是16个 答案是17


2 If n is a positive integer, what is theremainder when 3⁸ⁿ⁺³ + 2 is divided by 5?  我算的是4 答案是0


3 A certain companyassigns employees to offices in such a way that some of the offices can beempty and more than one employee can be assigned to an office.  In how many ways can the company assign 3employees to 2 different offices?  答案是8 我不确定这对不对


谢谢大家了哇~~~~

yangbaozi

第一题，你忘了1
楼下的继续