the largest 5 digit number exactly divisible by 91 is :
"explanation : largest 5 - digit number = 99999 91 ) 99999 ( 1098 91 - - - 899 819 - - - - 809 728 - - - 81 - - - required number = ( 99999 - 81 ) = 99918 . answer : d"
square_area(const_pi)