Question

chech whether the number 5n, where n is a natural number ends with digit 0.justify your answer​

Answer 1

If the number 5n,for any n were to end with the digit zero then it would be dividable by 2 and 5 that is the prime factorization of 5n would contain the prime 2 this is not possible because 5n so only primes in the factorization of 5n is 5 only .