The digital sum of a number is the sum of its digits. For how many of the positive integers 24-90 inclusive is the digital sum a multiple of 7?	Choose the correct choice from the following answers.
A) 10	B) 8	C) 14	D) 16	E) 20
is there other way than just listing?   25   34   43   52   59   61   68   70   77   86   10 ways..   10
<result>A</result>
The digital sum of a number is the sum of its digits. For how many of the positive integers 24-90 inclusive is the digital sum a multiple of 7?