perplexus.info :: Just Math : Root sum or integer?

Root sum or integer? (Posted on 2013-08-18)

Determine which of these is larger:

       29√14 + 4√15  or,    124

*** For an extra challenge, solve this problem using only pen and paper.

No Solution Yet Submitted by K Sengupta

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re(4): the hard way....slightly softened

Comment 6 of 6 |

OK.

No offense.

I hope that you know at least 2 additional proofs supporting the 14.5 result : 1). (a+b)^2=a^2+2ab , ignoring b^2 and 2). Newton's approximation.

All in all it was cute, albeit very easy puzzle.

Posted by Ady TZIDON on 2013-08-19 10:16:40

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