Q: Which is the greatest 6 digit number which is a perfect square?

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99*99=9801

729

729, cube of 9 and square of 27

1024

The largest 3-digit number - not itself a perfect square - is 999. Calculate its square root, round the answer down, then square the answer again.

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99801 is the greatest 5 digit number * * * * * 99801 is not a perfect square! Sqrt(99801) = 315.91 (approx). The largest 5 digit perfect square is 99856 = 3162

The largest 5 digit perfect square is 99856 = 3162

99*99=9801

998001 = 999 x 999

As 1 million is the lowest 7-digit number and also the square of one thousand, the number you seek is the square of 999, which I'm sure you can calculate!

3,162.27766 is the square root of a smallest 8 digit number and thus the greatest integer having the greatest 7 digit square is 3,162. This is because the square of the next integer i. e. 3,163 is going to be an 8 digit number as discussed above. Thus, 3,162 is the required answer. 3162^2 = 9998244.

9998244 (3162 sqrd)

x64 is not a perfect square any number if it is a 3-digit perfect square and ending with 4 it can be 144,324 ,484 and 784 because the number is ending with 4 but the tens digit is not matching to any of the option so it is not a perfect square

729

No. The smallest 2 digit number is 10 the smallest 3 digit number is 100 - so the question is whether (100-10) is a perfect square? No - 90 is not a perfect square. 8x8 is 64 and 9x9 is 91, not 90.

1600 (square of 40)

100489 is the lowest perfect square number.