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Question

If the number 517*324 is completely divisible by 3, then the smallest whole number in the place of * will be:

Options:
A .  0
B .  1
C .  2
D .  None of these
Answer: Option C

Sum of digits = (5 + 1 + 7 + x + 3 + 2 + 4) = (22 + x), which must be divisible by 3.


Therefore x = 2.


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