Question

Find the least number that must be subtracted from 19491 to make it a perfect square

Answer 1

19491-19321=170
(√19321=139)

Answer is 170

Answer 2

Answer:

At first, we've to judge the nearest perfect squared number to 19491.

which brings us to a conclusion that square of 139 is nearest and smaller than 19491, so do the following calculations;

(139)² = 19321 < 19491

Now subtracting 19321 from the number 19491, we'll get 170.

19491- 19321 = 170

So 170 is least number that must be subtracted to make 19491 a perfect squared number.