单选题In the correctly worked out addition example below, what is the greatest possible value of digit B?A9B8C6D5E4
单选题
In the correctly worked out addition example below, what is the greatest possible value of digit B?
A
9
B
8
C
6
D
5
E
4
参考解析
解析：
Since 2 is carried over from adding the digits in the first column, in the second column A+B+B+1= 14, so A+2B= 13. Since B must be an integer, A cannot be 0. Hence, the greatest possible value of digit B occurs when A = 1 and B = 6.
Since 2 is carried over from adding the digits in the first column, in the second column A+B+B+1= 14, so A+2B= 13. Since B must be an integer, A cannot be 0. Hence, the greatest possible value of digit B occurs when A = 1 and B = 6.
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