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Question

Find the value of A and B. (Here, A 0 and B 0)

   AB AB+ B  BB


A
A = 1 , B = 3
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B
A = 5, B = 2
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C
A = 2 , B = 5
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D
A = 3 , B = 1
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Solution

The correct option is C A = 2 , B = 5

B + B + B = B → on adding B three times, we are getting B again in the units place. This is only possible if B is either 0 or 5.

0 + 0 + 0 = 0 (this will give A = 0 and B = 0) and 5 + 5 + 5 = 15; and 1 is carried over.
It is given that A 0 and B 0.
B = 5

Now, we have

  1 + A + A = 5

            2A = 4

              A = 2

Let's verify

  25 25+ 5  55


Mathematics

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