Question

find the value of A. in the number 45A364 such that is divisible by 9

Answer 1

divisibility of 9 is the sum of numbers should be multiple of 9 .
4+5+3+6+4+A=27
22+A=27
A=5

Answer 2

See firstly the divisibility test of 9 is sum of all number is divisible by 9 so it is divisibility of 9 so...

$4 + 5 + 3 + 6 + 4 = 22$
so the sum is 22 so the A will be a number that would take the sum to 27.
so....
22+A=27
A=27-22=5
So... A=5

Hope it help...