Question

Please give me explanation and answer the question.
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Answer 1

Answer:

2)

a) We know that the divisibility rule of 9 is sum of digits is equal to 9

    So , 6 + 7 + * + 8 + 7 + 5 = 33 + *

   ∴ Smallest number to be added

              * = 36 - 33 = 3

Dude I don't know 2nd question please excuse me