Question

Find the smallest number by which 1780 must be added to make the sum a perfect square. *

Answer 1

-69 should be added to make it perfect square

Answer 2

$1452 = 2 \times 2 \times 3 \times 11 \times 11$

$when \: we \: multiplied \: or \: divided \: 1452 \: by \: 3 \: we \: \: will \: get \: a \: perfect \: square$