m is two digit number and 2m is a three digit number,what is the unit digit of mRT是GMAT的数学题1.the unit number of 2m is 42.the unit number of m is the same as the tens number of 2m

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m is two digit number and 2m is a three digit number,what is the unit digit of mRT是GMAT的数学题1.the unit number of 2m is 42.the unit number of m is the same as the tens number of 2m

m is two digit number and 2m is a three digit number,what is the unit digit of mRT是GMAT的数学题1.the unit number of 2m is 42.the unit number of m is the same as the tens number of 2m
m is two digit number and 2m is a three digit number,what is the unit digit of m
RT是GMAT的数学题1.the unit number of 2m is 4
2.the unit number of m is the same as the tens number of 2m

m is two digit number and 2m is a three digit number,what is the unit digit of mRT是GMAT的数学题1.the unit number of 2m is 42.the unit number of m is the same as the tens number of 2m
虽然是很久之前的了,可能楼主已经不需要了,但正好看到,并且发现下面给的答案也没帮助,希望自己的回答对其他有疑问的人有点帮助,如果错误,请大家指正.
题目意思是:
m 是一个两位数,2m是一个三位数,m 的个位数是什么?
(1)2m的个位数是4
(2)m 的个位数和2m的十位数相同.
由(1):2m的个位数是4,那么m的个位数可能是2 or 7,并不能确定
由(2):很明显由(2)单独得不出结论,并且即使在(1)的条件下,m也可以为62(2m=124)or 87(2m=174) 这个数并不是确定的
因此选E

M是两位数字和2M是一个三位数字,什么是数字单位米
1.200万单位的数量为4
2.M的单位数是200万千万的数目相同的

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