Question

There are 200 students in a school. For a PT drill they have to stand in such a manner that the number of rows is equal to the number of columns. How many more children sould be added to complete this arrangement?​

Answer 1

First of all

we've to find the nearest square number to 200

that is 196

and now

√196=14

that is 14 rows where 14 students in each row can be made,but we can arrange more children,thus we've to find the next square number

that is 225

which is √225,that it is the square of 15

thus 15 rows can be made with 15 students in each row,thus 25 more students are needed or else remove 4