Question

Find the greatest no. of 6-digit which is a prefect square.

Answer 1

The greatest 6-digit no is 999999
Now finding the square root of 999999
we get,
√999999=999.9995

Now since we need a perfect square 
We find the square of the no 999 without considering the decimal places,

So now we have,
⇒999×999=998001

So, the greatest 6-digit number which is a perfect square is 998001.

Answer 2

The greatest 6-digit no is 999999
Now finding the square root of 999999
we get,
√999999=999.9995

 since we need a perfect square 
so do square of  999 without taking decimal places,
that is
⇒ 999² = 998001