Question

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 children would be left out in this arrangement.

Answer 1

As the number of rows is equal to the number of columns,
we can take a square root of the total number of children.
If we take the square root of `500`, we have a remainder `16`.
It means `484` children can be arranged in `22` rows and `22` columns and rest `16` will be left out.