This forum is for my family to discuss and talk about whatever. Anyone else looking at it, I'd prefer you didn't look but if I can't stop you, then I can't stop you. Please don't if I can't.


You are not connected. Please login or register

Perfect Square Sum

Go down  Message [Page 1 of 1]

1 Perfect Square Sum on Tue Feb 02, 2010 12:25 am

EccentricPhilosopher

avatar
What is the first perfect square when the sum of the digits is equal to the square root?

2 Re: Perfect Square Sum on Tue Feb 02, 2010 8:23 pm

hazzmta

avatar
technically, 0 is the first perfect square, and the only digit is its square root, 0. this also works for 1, 2, and 3, which are all single digits, so the square of the sum of the digits is the original number. however, you said digitS, in which case there would need to be more than one digit. in that case, the first perfect square that applies is 9, because 9^2 = 81, and 8+1=9.

3 Re: Perfect Square Sum on Tue Feb 02, 2010 10:30 pm

EccentricPhilosopher

avatar
Correct!! and good point, I forgot about zero. Two and three don't work though.

2^2 = 4 which is not 2.
3^2 = 9 which is not 3.

Sponsored content


Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum