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In a certain two-digit number, the units’ digit is twice the tens’ digit. Column A Column B The tens’ digi
In a certain two-digit number, the units’ digit is twice the tens’ digit. Column A Column B The tens’ digi
admin
2009-05-19
78
问题
In a certain two-digit number, the units’ digit is twice the tens’ digit.
Column A Column B
The tens’ digit 5
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
B
解析
在某个两位数(two-digit number)中,个位数字是十位数字的2倍。
解:本题的正确答案是(B)。units’digit指个位的数字;tens’digit指十位的数字。个位数字是十位数字的2倍,那么个位数字只可能是:2,4,6,8;十位数字只可能是:1,2,3,4,否则将无法满足上面关系。
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