Find the largest 4 digit no. Which is perfect square
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Find the square root of 9999, which is 99.99.
Take the next lower integer or 99 and find its square which is 9801.
The greatest 4-digit number which is a perfect square is 9801.
Take the next lower integer or 99 and find its square which is 9801.
The greatest 4-digit number which is a perfect square is 9801.
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9999 is the largest 4 digit number and 100^2 is 100000 , or 1 greater than largest 4 digit number
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