We have to find the Greatest 6 digit number which is a perfect square using the long division method.
We know that Greatest 6-Digit Number = 999999
Now we try to find a square of 999999 by long division method.
Long Division’s pic is attached.
We get 999999 is not a perfect Square.
But we subtract 1998 from 999999, we get a perfect square.
⇒ 999999 – 1998 = 998001 is the greatest perfect square of 6-Digit