Question

find the least number which should be added to 42873 to make it a perfect square

Answer 1

nos ending with 2,3,7,8 are non perfect squares .hence we should add 1 to it

Answer 2

Question says to find the least number which should be added to 42873 to make it a perfect square. So first we will try to find a perfect square number which is closest but larger than given number 42873.

From table we see that 43264is the closest square number and bigger than 42873.

We have to find what number should be added into 42873 to get perfect square number 43264. So basically we just have to find their difference.

43264-42873 = 391

So the final answer is 391 .