Comments on: Number Puzzle #7 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/ Ramblings of a Christian Mathematician and Bioinformaticist Tue, 09 Mar 2010 23:37:39 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: tpc http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-128376 tpc Sun, 01 Mar 2009 00:48:14 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-128376 Dave, As far as I remember, I don't think there are other answers, for example 9900 is neither divisible by 8 nor 7, so we didn't need to discard that based on Mr Jones' age, although that would be much faster. Dave,

As far as I remember, I don’t think there are other answers, for example 9900 is neither divisible by 8 nor 7, so we didn’t need to discard that based on Mr Jones’ age, although that would be much faster.

]]> By: Dave http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-128094 Dave Thu, 26 Feb 2009 15:53:06 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-128094 Oops - didn't realize that the answer was already posted. Oops – didn’t realize that the answer was already posted.

]]> By: Dave http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-128093 Dave Thu, 26 Feb 2009 15:50:12 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-128093 Cute puzzle! However, tpc, the answer is not unique if you don't have the fact that the last two digits equal the age of Mr. Jones. I guess a follow up question would be "What other answer(s) would be possible without that constraint?" Cute puzzle! However, tpc, the answer is not unique if you don’t have the fact that the last two digits equal the age of Mr. Jones. I guess a follow up question would be “What other answer(s) would be possible without that constraint?”

]]> By: Natural Blogarithms » Blog Archive » Number Puzzle #7 – A solution http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-127807 Natural Blogarithms » Blog Archive » Number Puzzle #7 – A solution Sun, 22 Feb 2009 21:34:46 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-127807 [...] was the puzzle posted last week: Mr. Jones has eight children of different ages.  On a family trip his oldest child, who is 9, [...] [...] was the puzzle posted last week: Mr. Jones has eight children of different ages.  On a family trip his oldest child, who is 9, [...]

]]> By: tpc http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-127741 tpc Sun, 22 Feb 2009 05:02:35 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-127741 Nice! I managed to solve the problem without using the fact that the last two digits equal the age of Mr Jones, but that involved looking through many cases. I searched and found a much faster solution using that clue. Nice! I managed to solve the problem without using the fact that the last two digits equal the age of Mr Jones, but that involved looking through many cases. I searched and found a much faster solution using that clue.

]]> By: Math Teachers at Play #1 « Let’s Play Math! http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/comment-page-1/#comment-127573 Math Teachers at Play #1 « Let’s Play Math! Fri, 20 Feb 2009 12:23:59 +0000 http://blog.drscottfranklin.net/2009/02/09/number-puzzle-7/#comment-127573 [...] Scott Franklin has been sharing stumpers over at Natural Blogarithms. His Number Puzzle #7 is a divisibility challenge from the 2006 AMC [...] [...] Scott Franklin has been sharing stumpers over at Natural Blogarithms. His Number Puzzle #7 is a divisibility challenge from the 2006 AMC [...]

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