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Question
Find the values of the letters in each of the following and give reasons for the steps involved.
3 A
+ 2 5
-------
B 2
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Solution
The addition of A and 5 is giving 2 i.e., a number whose ones digit is 2. This is possible only when digit A is 7. In that case, the addition of A (7) and 5 will give 12 and thus, 1 will be the carry for the next step. In the next step,
1 + 3 + 2 = 6
Therefore, the addition is as follows.
Clearly, B is 6.
Hence, A and B are 7 and 6 respectively.
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