How many of the following numbers are divisible by 3 but not by 9.
4320, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276  Select the correct option:	A) 5	B) 6	C) 7	D) 8	E) 9
Taking the sum of the digits, we have :   S1 = 9, S2 = 12, S3 = 18, S4 = 9, S5 = 21, S6 = 12, S7 = 18, S8 = 21, S9 = 15, S10 = 24.   Clearly, S2, S5, S6, S8, S9, S10 are all divisible by 3 but not by 9.   So, the number of required numbers = 6.   ANSWER:6
<result>B</result>
How many of the following numbers are divisible by 3 but not by 9.
4320, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276