1What is the tens digit of positive integer x ?() (1)x divided by 100 has a remainder of 30. (2)x divided by 110 has a remainder of 30. A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条...
相关知识点: 试题来源: 解析 B 100000000=28×58, Like all powers of5⩾52,58 ends in”25”. 100000000的最大奇数的十位数字是( ). A.0 B.2 C.4 D.6 10000000=28×58,所有大于等于52的5的指数都以“25”结尾. 故选B.反馈 收藏
百度试题 结果1 题目【题目】What is the tens digit of 72011? ( ). A.0 B.1 C.3 D.4E7 相关知识点: 试题来源: 解析 【解析】D 反馈 收藏
Since 10! is divisible by 100, any factorial greater than 10! is also divisible by 100. The last two digits of all factorials greater than 10! are 00, so the last two digits of 10!+11!+…+2006! are 00.(∗). So all that is needed is the tens digit of the sum 7!+...
The largest 4-digit even number usin g these digits exactly once each ends in an 8 and is 9758, The tens’ digit is 5. 用5,7,9,8来构成一个四位数,那么最大的4位数偶数的十位数字是( ). A. 9 B. 8 C.7 D. 5 最大的4位数偶数,一定要是以8结尾的,那么这个数9758,那么十位数字是5...
百度试题 结果1 题目 What is the tens digit of 72011?( ). A. 0 B. 1 C. 3 D. 4 E. 7 相关知识点: 试题来源: 解析 D 反馈 收藏
百度试题 结果1 题目What is the tens digit of 7^(2011)?( ). A. 0 B. 1 C. 3 D. 4 E. 7 相关知识点: 试题来源: 解析 D 反馈 收藏
What is the tens digit of ? A: B: C: D: E: 相关知识点: 试题来源: 解析 A Notice that, for , is congruent to mod when is even and mod when is odd. Check for yourself. Since is even, mod and mod . So the answer is . In a very similar fashion, we find that mod , whi...
(In this way, we don't have to worry about the exponent very much.) Finally, 2017≡17( mod 100), and thus 20152016−2017≡25−17≡08( mod 100), as above.结果一 题目 What is the tens digit of 20152016−2017?( )A.0B.1C.3D.5E.8 答案 A相关推荐 1What is the tens...
百度试题 结果1 题目What is the tens digit of 72011?( ). A. 0B. 1C. 3D. 4E. 7相关知识点: 试题来源: 解析 D 反馈 收藏