Find the number of five-digit positive integers, n, that satisfy the following conditions:
(a) the number n is divisible by 5 ,
(b) the first and last digits of n are equal, and
(c) the sum of the digits of n is divisible by 5 .
Find the number of five-digit positive integers, n, that satisfy the following conditions:
(a) the number n is divisible by 5 ,
(b) the first and last digits of n are equal, and
(c) the sum of the digits of n is divisible by 5 .