Question 18
The product of the two $99$-digit numbers $$
303,030,303,\ldots,030,303
$$ and $$
505,050,505,\ldots,050,505
$$ has thousands digit $A$ and units digit $B.$ What is $A+B?$
303,030,303,\ldots,030,303
$$ and $$
505,050,505,\ldots,050,505
$$ has thousands digit $A$ and units digit $B.$ What is $A+B?$