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Question:

Find the values of the letters in the following and give reasons for the steps involved. A 1 + 1 B –––– B 0 ––––

Solution:

If 1 + B = 0, then B has to be 9. With B = 9, Now, we have condition A + 1 + 1 (carry over) = B. i.e. A + 2 = 9 So, A = 7, B = 9