Find the smallest number that must be added to 1780 to make it a perfect square.	Options.
A) 17	B) 42	C) 69	D) 47	E) 52
4 1780 (42   16   82	180   164   16   Number to be added = (43)2 - 1780 = 1849 - 1780= 
<gadget id="calculator">1849 - 1780</gadget>
<output>69</output>
69.   ANSWER 69
<result>C</result>
Find the smallest number that must be added to 1780 to make it a perfect square.