Just following up on Ian's recent messages, see below. Ian tells me the only major items outstanding for publishing the second edition are these two questions.
Any help on them would be much appreciated, thanks. -------- Original Message -------- Subject: Re: [Jprogramming] APWJ exercises for the reader [3 of 4] Date: Thu, 19 Nov 2009 03:56:05 +0000 From: Ian Clark <earthspo...@googlemail.com> Reply-To: Programming forum <programming@jsoftware.com> To: Programming forum <programming@jsoftware.com> References: <45319e520911110355r6b78ebd2paec3ebeb2cb8d...@mail.gmail.com> Almost ready to publish APWJ Edn. Just need answers to these 2 problems, [3 of 4] and [4 of 4]. Ian On Wed, Nov 11, 2009 at 11:55 AM, Ian Clark <earthspo...@googlemail.com> wrote: > In At Play With J Edn 1, there were 4 questions left as exercises for > the reader. In Edn 2 we want to provide the answers in an Appendix. > > Just so I don't get them wrong, could the forum please suggest what > the answers should be? You may have to refer to the Wiki page. > > I'm putting each question in a separate thread. > > +++++ > In: Ch 23 An Open and Shut Case > http://www.jsoftware.com/jwiki/Doc/Articles/Play164 [see end-of-page] > > "Here are the rest of the questions Amy had to answer. See if you can > answer them. > A. What do you notice about the lockers that were touched by > exactly two students? (Try m19 >: 2=dc ) > B. What do you notice about the lockers that were touched by > exactly three students? > C. What do you notice about the lockers that were touched by > exactly four students? > D. What was the first locker touched by both student 6 and student 8? > E. What do you notice about the student numbers of the students > that touched both locker 24 and locker 36? > F. Which students touched both locker 100 and 120? What do you > notice about their student numbers?" > +++++ > > Ian Clark > Subeditor, APWJ Edn 2 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm -------- Original Message -------- Subject: Re: [Jprogramming] APWJ exercises for the reader [4 of 4] Date: Thu, 19 Nov 2009 03:54:38 +0000 From: Ian Clark <earthspo...@googlemail.com> Reply-To: Programming forum <programming@jsoftware.com> To: Programming forum <programming@jsoftware.com> References: <45319e520911110356p50df3c4bye05e039b70bb...@mail.gmail.com> Almost ready to publish APWJ Edn. Just need answers to these 2 problems, [3 of 4] and [4 of 4]. Ian On Wed, Nov 11, 2009 at 11:56 AM, Ian Clark <earthspo...@googlemail.com> wrote: > In At Play With J Edn 1, there were 4 questions left as exercises for > the reader. In Edn 2 we want to provide the answers in an Appendix. > > Just so I don't get them wrong, could the forum please suggest what > the answers should be? You may have to refer to the Wiki page. > > I'm putting each question in a separate thread. > > +++++ > in: Ch 38 The Google Test > http://www.jsoftware.com/jwiki/Doc/Articles/Play211 [see end-of-page] > > Problem 2: Finding the sixth in a series > > You are given five 10-digit numbers from the digits of pi, and must > find the sixth. Here are the numbers: > > 4338327950 > 2795028841 > 6939937510 > 3993751058 > 2110555964 > > Here they are, embedded in pi: > > 7 30 $ w > 31415926535897932384626<4338327 > 95028841>971<693993751058>2097494 > 459230781640628620899862803482 > 534211706798214808651328230664 > 709384460955058223172535940812 > 84811174502841027019385<2110555 > 964>462294895493038196442881097 > > The first and second overlap, as do the third and fourth. > > I'll give two hints, the second vacuous: > > Hint 1: Primarily, the sixth number has three doublets and overlaps the fifth. > > Hint 2: Alternately, something for nothing. > +++++ > > > Ian Clark > Subeditor, APWJ Edn 2 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
