Answer:
A. 7605
Step-by-step explanation:
If a number is divisible by 9, it is also divisible by 3.
A number is divisible by 9 if the sum of its digits equals 9 or an integral multiple of 9.
A. 7605
7 + 6 + 0 + 5 = 18 (an integral multiple of 9)
; divisible by 9.
B. 7690
7 + 6 + 9 + 0 = 22 ; not divisible by 9
C. 5390
5 + 3 + 9 + 0 = 17 ; not divisible by 9
B. 4524
4 + 5 + 2 + 4 = 15 ; not divisible by 9
The only number divisible by 3 and 9 is 7605.
