Question

Fill in the blank

$\begin{array}{ccc}6& 8& \left(5\right)\\ 14& 7& \left(10\right)\\ 13& 6& (-)\\ a& b& c\end{array}$

Answer 1

The series follows the rule : (a $\times$ b + 2) $÷$ 10 = c
$(6\times 8)+2=50;50÷10=5$
$(14\times 7)+2=100;100÷10=10$
$(13\times 6)+2=80;80÷10=8$