how many digits are used to number a book containg 300 pages .
explanation : number of digits in 1 digit numbers = 1 to 9 = 9 number of digits in 2 digit numbers = 10 to 99 = 90 ( 2 ) = 180 number of digits in 3 digit numbers = 100 to 300 = 201 ( 3 ) = 603 total = 792 answer : option b
add(add(multiply(300, const_2), const_100), subtract(subtract(const_100, const_4), const_4))