What is the least number to be added to 661 to make it a perfect square?
Choose the correct choice
A) 13
B) 15
C) 20
D) 16
E) 45
The numbers greater than 661 and are square of number is 676.   The least number that should be added 661 to make it perfect square = 676 - 661= 
<gadget id="calculator">676 - 661</gadget>
<output>15</output>
15.   ANSWER:15
<result>B</result>
What is the least number to be added to 661 to make it a perfect square?