Question

Some equations are solved on the basis of a certain system. On the basis, find out the correct answer from amongst the four alternatives for the unsolved equation:
$a=4\left(369\right)9,b=6\left(246\right)4,c=7(?)3$

• A. 303
• B. 213
• C. 413
• D. 503

Answer 1

The correct option is B 213

4×9=36⇒3+6=9⇒3694×9=36⇒3+6=9⇒369
6×4=24⇒2+4=6⇒2466×4=24⇒2+4=6⇒246
7×3=21⇒2+1=3⇒213