Question

In the correctly worked out multiplication problem at the below, each letter represent a different digit. What is the value of B ?

• A. $1$
• B. $2$
• C. $4$
• D. $5$

Answer 1

The correct option is B $2$

We know that

$B+A=3$

There are no carry forwards from the units digit. $B$ can either be 1 or 2 or $A$ can either be 1 or 2.

From the second row we know that $A\times A=A$ It is only possible if $A=1$

Therefore, $B=2$

Answer is Option B