There are 500 children in a school. For a P.T. drill they have to stand in such a manner that the number of rows is equal to number of columns. How many childrenwould be left out in this arrangement.
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no. of rows = 3
no of couloms = 3
TOTAL STUDENTS= no of students in first row+second row+ third row
3+3+3
=9
no of rows x no of column
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