Nguyen Ninh
04/08/2017 at 09:44-
Dao Trong Luan 04/08/2017 at 09:49Call the number to find is a
=> a = 342k + 47
a = 18.19k + 2.19 + 9
= 19[18k + 2] + 9
=> a divide by 19 residual 9
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CTC 04/08/2017 at 09:46Call the number is n.
We have : \(n=342q+47\)
\(\Leftrightarrow n=19\cdot18q+19\cdot2+9=19\cdot\left(18q+2\right)+9\)
So when divide 19 the remainder would be 9.
Nguyen Ninh selected this answer.