Question

find the least 6 digit number which is a perfect square?

Answer 1

square of 361=99856.

Answer 2

To find the least six digit perfect square number proceed as follows :-

the least six digit number is 100000
so now we perform square root of 100000 
square root of 100000 is about 316.227766............
so the next six digit perfect square would be square if 1 more than 316 which is 317 

so the least six digit perfect square number is 317^2 = 100489