Question

Qus. 4 What we have to subtract from 18780 to make it perfect square?
Your answer​

Answer 1

Answer:

In respect of problems regarding by what we should multiply or divide a number to make it a perfect square, we should use prime factorisation method to look for unpaired numbers.

In respect of problems like this one, we should use long division method of finding square root. In the process the remainder obtained is our number of importance.

1. | 18780. |. 13

+1. |. -1

-----------------

23 |. 087

+3 |. -69

---------------------

267. | 1880

7. |. - 1869

-------------------;;

11

the remainder is 11. If there was no remainder, then the number would be perfect square as we would find out the square root.

So if we subtract 11 from given number the number would become perfect square.

so ans is 11