How many 4-digit numbers are common multiples of 7 and 11?选择(1)10(2)116(3)117(4)232求方法

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How many 4-digit numbers are common multiples of 7 and 11?选择(1)10(2)116(3)117(4)232求方法

How many 4-digit numbers are common multiples of 7 and 11?选择(1)10(2)116(3)117(4)232求方法
How many 4-digit numbers are common multiples of 7 and 11?
选择(1)10
(2)116
(3)117
(4)232
求方法

How many 4-digit numbers are common multiples of 7 and 11?选择(1)10(2)116(3)117(4)232求方法
要四位数字是7和11的公倍数,那么也就是说,从1000----9999里面有多少个数字是7和11的公倍数,7和11都是质数,所以他们的最小公倍数是77,那么在1000到9999里面有几个数字能整除77就是答案.用10000除以77,商129,说明10000里面有129个数可以整除77.再用1000除以77,商12说明在1000以内有12个数能整除77,我们要的只是1000----9999之间的,那么就是129-12=117.

How many 3-digit numbers between 100 and 1000 have a 4 as the middle digit?的翻译 英语翻译how many integers between 9 and 100 have the tens digit equal to 4 or 5 and the units digit(ones digit ) equal to 7,8 or 求英语翻译For how many positive two-digit interger is the ones digit greater than twice the tens digit? 英语翻译How many 3-digit positive integers are odd and do not contain the digit 5? 英语翻译How many 3-digit numbers have only one digit 5 in them? How many 3-digit numbers have only one digit 5 in them? How many four-digit positive integers are there with thousands digit How many 3-digit numbers are divisible by How many 3-digit positive intergers are odd and do not contain the digit 怎么算?请指教 How many 4-digit numbers are common multiples of 7 and 11?选择(1)10(2)116(3)117(4)232求方法 How many different four-digit numbers can be formed by rearranging the four digits in 2004?A.4 B.6 C.16 D.24 E.81 How many 3 digits numbers have exactly one digit 5 in them?ji How many 3-digit numbers have exactly one digit 5 in them4月22日11点之前解答,谢谢了!(解释并写出答案) 关于阶乘的How many seven-digit telephone numbers are there for any one area code if the numbers 0 or 1 can not be used as the first digit of a seven digit phone number? SAT一道数学how many positive four-digit integers have 1 as their first digit and 2 or 5 as their last digit?答案说是200,我为什么觉得是144? how many even three-digit integers haver the property that their digits ,read left to right ,are strictly increasing order? how many one,two or three digit numbers can be written out of 1,2 and 求翻译帝 Of the two-digit positive integers less than 20 how many have different digits翻译翻译〜〜