680621 में कौन सी न्यूनतम संख्या जोड़ी जाए कि योग एक पूर्ण वर्ग हो?
A. 4
B. 5
C. 6
D. 8
A. 4
B. 5
C. 6
D. 8
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Correct Answer – A
As we know square of 825 is 680625.
`:.` The smallest number added to 680621 to make a perfect square is 4.