Question

In the following, find the digits represented by the letters:
$16$
$\underset{–}{+2A}$
$\underset{–}{B1}$

Answer 1

In the given problem, the addition of $6$ and $A$ is giving $1$ that is a number whose one's digit is $1$. In that case addition of $6$ and $A=5$ will give $11$ and thus $1$ will be carried for the next step.

In the next step,

$1+1+2=B\Rightarrow B=4$

Hence, the letters $A=5$ and $B=4$.