Find the quotient when $\left(86+68\right)$ is divided by $11$.

Without performing actual subtraction and division write the quotient when $92-29$ is divided by $9$.

Without performing actual subtraction and division write the quotient when $92-29$ is divided by $7$.

Find the values of the letters and give reasons for the steps involved.

Find the values of the letters in the following and give reasons for the steps involved.

$\begin{array}{cc} 2& B\\ +4& B\\ A& A\end{array}$

Find the values of the letters in the following and give reasons for the steps involved.

$\begin{array}{ccc}& 6& A\\ +& 8& 7\\ C& B& 3\end{array}$