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Asked by Shagufta Last Modified
Answer It is given that there are 500 children in the school. They have to stand for a P.T. drill such that the number of rows is equal to the number of columns.
The number of children who will be left out in this arrangement has to be calculated. That is, the number which should be subtracted from 500 to make it a perfect square has to be calculated.
The square root of 500 can be calculated by long division method as follows.
| 22 | |
| 2 |
|
| 42 | 100 84 |
| 16 |
The remainder is 16.
It shows that the square of 22 is less than 500 by 16. Therefore, if we subtract 16 from 500, we will obtain a perfect square.
Required perfect square = 500 − 16 = 484
Thus, the number of children who will be left out is 16.
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