Question

find the greatest number of five digits which is a perfect square​

Answer 1

the number is 99999 it's a prefect square

Answer 2

Step-by-step explanation:

We know that the largest 5 digit number is 99999.

So let us check whether it is a perfect or not ?

As we can see in the attachment that it is not a perfect square

So, 99999 is not a perfect square as it leaves 143 as the remainder while finding it's square root.

So to get the perfect square we will subtract the remainder i.e.

99999 - 143 = 99856

Hence 99856 is a perfect square whose square root is √99856 = 316.