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Question
Find the value of the letters in the following question.
A A
+A A
XA Z
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Solution
A A
We have, +A A
XA Z
Here A + A = Z, therefore A can take any value between 0 to 9.
Since, the sum in second column is a two-digit number, the possible values of A are 5 to 9.
The values A = 5 to 8 are not fitted in second column.
Hence, A = 9 ⇒ Z = 8 and X = 1
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