一道data sufficiency题

yushuang5555

If * represents a digit in the 7-digit number 3, 62*, 215, what is the value of * ?

1) the sum of the 7 digits if equal to 4 times an integer

2) the missing digit is different from any of the other digits in the number.

答案是c

题目不怎么看得懂~~~请各位大侠指点指点~~~

yang_jing_8

3+6+2+5+*+2+1+5=19+*=4n, n is an integer and *is an integer from1 to 9
when * is 1, 5, or 9, the above equation is valid.
conbine with condition (2), the 9 is the only possible answer.

yushuang5555

可否麻烦大侠帮我翻译下题目阿？？？