Respuesta :
Answer:
The rule for divisibility by 9 works because numbers are written in base 10.
Step-by-step explanation:
The sum of the digits is calculated as follows:
5 + 2 + 2 = 9
9 is divisible by 9, Therefore, 522 is divisible by 9
5 + 2 + 2 = 9
9 is divisible by 9, Therefore, 522 is divisible by 9