$2 A B$
$+ A B 1$

$B 18$

Find the values of $A$ and $B$ in the above addition.

A = 0, B = 5

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A = 3, B = 7

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A = 4, B = 7

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A = 7, B = 8

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Solution

The correct option is C $A = 4, B = 7$
From the given equation,
$B + 1 = 8$ (i)
$\Rightarrow B = 7$
$A + B$ + carry-over = $1$ (ii)
Since $B = 7$ , $A + B$ + carry-over has to $11$
Also, $2 + A +$ carry-over $= B$ (iii)
$\Rightarrow A = 4$

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