Question

Find the least number which must be subtracted from 1989 so as to get a

perfect square. Also find the square root of the perfect square so obtained​

Answer 1

Answer:

If we subtract 53 from 1989, we get 1936 which is the perfect square. Hence 53 is the least number to be subtracted from the given number (1989) to get a perfect square.

Answer 2

Step-by-step explanation:

here we should cannot use prime factorisation method because here they asked for subtraction. so we can use only divison method

when we use divison method the the remainder will be 5

so, we should aubtract 5 from 1989 toget perfect square that is

= 1989-5

= 1984

1984 is a perfect square

hence, we should subtract 5 from 1989 to get perfect square

thank you