题库搜索>问题求解PS-12225
If n = 811 – 8, what is the units digit of n?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
当前版本由 Kiana 更新于2017-09-13 14:25:06 感谢由 Kiana 对此题目的解答所做出的贡献。8的循环是:8,4,2,6 811的个位是2,2-8=4,选C
尾数为8的数的幂的个位数一定以,8、4、2、6循环,如题811-8=810,,所以,以4循环。
虫0515
看错题了...看成了结果是几位数然后瞎蒙了一个,哎
337024ygjon
漏掉了最开始的8
jaysean
余数是8426循环 11/4余3 所以是2 2-8的个位应该是4
科目:
问题求解PS
来源:
GWD
1m15s
平均耗时
77.3%
平均正确率
该题由网友CFfL9Wv提供
点击上传问题求解PS -18032
1-Acting on the recommendation of a British government committee investigating the high incidence...
问题求解PS -18027
Let S be the set of all positive integers having at most 4 digits and such that each of the digits is 0 or 1 What is the greatest prime factor of the sum of all the numbers in S?
问题求解PS -17897
If n= p2 and p is a prime number greater than 5, what is the units digit of n2 ?
问题求解PS -17884
Five integers between 10 and 99, inclusive, are to be formed by using each of the ten digits exactly once in such a way that the sum of the five integers is as small as possible.What is the greatest possible integer that could be among these five numbers?
问题求解PS -17876
If Whitney wrote the decimal representations for the first 300 positive integer multiples of 5 and did not write any other numbers how many times would she have written the digit 5?
问题求解PS -18032
1-Acting on the recommendation of a British government committee investigating the high incidence...
问题求解PS -18027
Let S be the set of all positive integers having at most 4 digits and such that each of the digits is 0 or 1 What is the greatest prime factor of the sum of all the numbers in S?
问题求解PS -17897
If n= p2 and p is a prime number greater than 5, what is the units digit of n2 ?
问题求解PS -17884
Five integers between 10 and 99, inclusive, are to be formed by using each of the ten digits exactly once in such a way that the sum of the five integers is as small as possible.What is the greatest possible integer that could be among these five numbers?
问题求解PS -17876
If Whitney wrote the decimal representations for the first 300 positive integer multiples of 5 and did not write any other numbers how many times would she have written the digit 5?