the four-digit numeral 3AA1 is divisible by 9. What digit does A represent?
a number is divisible by 9 is you can add all the digits up and that number is divisible by 9.
So, we can make the equation 3+2A+1= x (x has to be a multiple of 9)
We can't make x=9 because then A would have to be a decimal.
So, let's make x=18.
I hope this helped you, guest!