What is the least number to be subtracted from 800 to make it a perfect square?	Choose the most appropriate option.
A) 1  B) 16  C) 20  D) 71  E) 60
The numbers less than 800 and are squares of certain number is 784.   The least number that should be subtracted from 800 to make it perfect square = 800 - 784= 
<gadget id="calculator">800 - 784</gadget>
<output>16</output>
16.   ANSWER:16
<result>B</result>
What is the least number to be subtracted from 800 to make it a perfect square?