If the number 517*324 is completely divisible by 7, then the smallest whole number in the place of * will be: Options:
A) 3  B) 1  C) 2  D) 4  E) 6

Rationale: sum of digits = ( 5 + 1 + 7 + x + 3 + 2 + 4 ) = ( 22 + x ) , which must be divisible by 7 . x = 6 . e
Answer: E