7 digit number

If 3c54d10 is divisible by 330, what is the sum of c and d?

Correct result:

s1 =  8
s2 =  5
s3 =  11

Solution:

$\ \\ x_{2}=3454110 \ \\ y_{2}=x_{2} / 330=3454110 / 330=10467 \ \\ s_{2}=4+1=5$
$\ \\ x_{3}=3754410 \ \\ y_{3}=x_{3} / 330=3754410 / 330=11377 \ \\ s_{3}=7+4=11$

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