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Question:

A gardener has 1000 plants. He wants to plant these in such a way that the number of rows and the number of columns remain the same. Find the minimum number of plants he needs more for this.

Solution:

1000 is not a perfect square.
31² = 961 < 1000
32² = 1024 > 1000
Required number of plants = 1024 - 1000 = 24.