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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 = 5B + 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

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