A Child has 1200 five rupee coins He wants to place them in such a way that the number of rows and t...........

Logical Reasoning(Master ) Arithmetical Reasoning

A Child has 1200 five rupee coins. He wants to place them in such a way that the number of rows and the number of columns remains the same. What is the minimum number of coins that he needs more for this purpose?

125

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Explanation:

We know that, to be in the form that the number of rows and the number of columns to be equal the number should be a perfect square (a²).
Given number is 1200
The perfect number which is above and near to 1200 is 1225 which is 35 $\times$ 35.
Therefore, The minimum number of coins he need is 25.