Answer:
a b and c
Step-by-step explanation:
a) a number is divisible by 3 if the sum of its dígits is divisible by 3:
3+4+5+1+5=18
18 is divisible by 3 (6*3=18), then 34515 is divisible by 3 too.
b)a number is divisible by 9 if the sum of its dígits is divisible by 9:
3+4+5+1+5=18
18 is divisible by 9 (9*2=18), then 34515 is divisible by 9 too.
c) a number is divisible by 5 if its last digit is 5 or 0
then, 34515 is divisible by 5
