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set 25 q 37

Expert replies
by radhika1306 » Thu Sep 06, 2007 8:59 am
AB
+BA
-----
AAC
In the correctly worked addition problem shown, where
the sum of the two-digit positive integers AB and BA is
the three-digit integer AAC, and A, B, and C are different digits, what is the units digit of the
integer AAC?
A. 9
B. 6
C. 3
D. 2
E. 0
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Source: — Problem Solving |

by ri2007 » Thu Sep 06, 2007 9:19 am
The answer should be E = 0

A = 1, B = 9

19
+91
------
110
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by karthick451 » Fri Sep 07, 2007 11:01 am
A + B = C + 10K
A + B + K = AA

C + 10K + K = AA

C + 11K = AA

C has to be 0 since AA from 11 to 99 is divisible by 11.
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