Find the least number that is to be subtracted from 2000 to make it perfect square

Find the least number that is to be subtracted from 4000 to make it perfect square

Find the smallest number that has to be subtracted from 256, so that it becomes exactly divisible by 10 ?

Find the least number which must be added to 6412 to make it a perfect square.

Find the smallest number that can be subtracted from 1965, so that it becomes divisible by 4?

Subtract -5 from 6.

Subtract -5 from 6.

_______should be subtracted from 4215 to become a perfect square number.

Write the greatest number that must be subtracted from 379, so that it divides by 5?