find the value of z for which the number 417z8 is divisible by 9 also find the number

Dear student,.....A number is divisible by 9 when the sum of its digit is divisible by 9 4+7+1+z+8 =20 +z the closest multiple of 9 to 20 is 27 Therefore 20+z =27 z =27-20 z = 7......Regards.