Question

Find the least number which must be subtracted from 1898 to make it perfect square

Answer 1

To know that we have to find some squares 41 to 45
41^2 = 1681
42^2=1764
43^2=1849
44^2=1936
so 43 is a perfect square
1898-1849=49
the least number to be substract from 1898 to get perfect square is 49