If the number 517?324 is completely divisible by 3,then the smallest whole number in place of ? will be:
Correct Answer: Option A
Sum of digits = (5 + 1 + 7 + x + 3 + 2 + 4) = ( 22 + x ),which must be divisible by 3.
Whe x=2. [(22 + 2) = 24 is divisible by 3] Answer is 2
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