how many integers from 101 to 1000 , inclusive , remains the value unchanged when the digits were reversed ?
"question is asking for palindrome first digit possibilities - 1 through 9 = 9 second digit possibilities - 0 though 9 = 10 third digit is same as first digit = > total possible number meeting the given conditions = 9 * 10 = 90 answer is e ."
divide(1000, const_10)