(i) The least number that should be subtracted from a so that b divides the difference exactly

Find the least number which should be subtracted from 9999 so that the difference is exactly divisible by 16 ?

(ii) The least number that should be added to a so that b divides the sum exactly =b-r.

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

What is the least positive integer that should be subtracted form 2750 so that the difference is a perfect cube?

What should be subtracted from (-3)/4 so as to get 5/6?

What should be subtracted from (-3)/4 so as to get 5/6?

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

What least number should be subtracted from 86295031 so that the remainder is exactly divisible by 582 ?