Problem: a “ palindromic integer ” is an integer that remains the same when its digits are reversed . so , for example , 43334 and 516615 are both examples of palindromic integers . how many 6 - digit palindromic integers are both even and greater than 300,000 ?
Rationale: "the first digit and last digit are the same so the 3 possibilities are 4 , 6 , or 8 . the second and third digits can be any digit from 0 to 9 . the total number of palindromic integers is 3 * 10 * 10 = 300 the answer is c ."
annotated_formula: multiply(multiply(subtract(6, const_4), const_10), const_10)