On Wed, 20 Nov 2013 15:06:44 +0000, Alister wrote: > On Wed, 20 Nov 2013 14:49:59 +0000, Alister wrote: > >> On Wed, 20 Nov 2013 13:57:30 +0000, Mark Lawrence wrote: >> >>> On 20/11/2013 09:29, Alister wrote: >>>> On Wed, 20 Nov 2013 00:54:28 -0500, Dave Angel wrote: >>>> >>>>> On 20 Nov 2013 03:52:10 GMT, Steven D'Aprano <st...@pearwood.info> >>>>> wrote: >>>>>> 2 does count because it isn't divisible by 3. The question states, >>>>>> "[count] how many positive integers less than N are not divisible >>>>> by 2,3 >>>>>> or 5". Two is not divisible by 3, so "not divisible by 2,3 or 5" is >>>>> true, >>>>>> so two gets counted. >>>>> >>>>>> The first number which is divisible by *all* of 2, 3 and 5 (i.e. >>>>> fails >>>>>> the test, and therefore doesn't get counted) is 30. The next few >>>>> that >>>>>> fail the test are 60, 90, 120, 150, 180, 210, 240, 270, 300, ... >>>>>> Remember, these are the numbers which should not be counted. >>>>> >>>>>>> I count 1, not 6 >>>>> >>>>>> Out of curiosity, which number did you count? >>>>> >>>>> 1 of course. It's the only one that's not divisible by any of the >>>>> factors. >>>>> >>>>> Apparently we disagree about precedence and associativity in >>>>> English. >>>>> I believe the not applies to the result of (divisible by 2, 3, or >>>>> 5), >>>>> so I'd count 1, 7, 11, 13, 17, 19, 23. The first nonprime would be >>>>> 49. >>>>> >>>>> If I were trying to get the series you describe, I'd phrase it as >>>>> "Not divisible by 2, and not divisible by 3, and not divisible by >>>>> 5" >>>> >>>> This ambiguity is a great example of why teachers (and enayone else >>>> responsible for specifying a programming project) should take greater >>>> care when specifying tasks. >>>> if it is to late to ask for clarification (the correct step in a real >>>> world case) I suggest you write 2 programs 1 for each interpretation, >>>> it will be good for your personal learning even if the teacher does >>>> not give any extra credit. >>>> >>>> >>> Ambiguity is the reason that some of the most expensive language >>> lessons in the world are at places like Sandhurst and West Point. >>> Giving crystal clear orders, whether verbally or in writing, is >>> considered quite important in the military. >>> >>> By the way, this is double posted and there were four identical >>> messages from you yesterday, finger trouble or what? :) >> >> I don't think the problem is at my end. I am only sending once to the >> best of my knowledge (using Pan newsreader to Comp.lang.python) > > Ok this is now silly Apologies to everyone I am monitoring my network > connection to confirm that i am not sending multiple times.
that last one seemed good must be a strange quirk of pan & turned off hide to system tray & allow multiple instances. not sure why either of them should cause the problem, I only have 1 copie running -- Next to being shot at and missed, nothing is really quite as satisfying as an income tax refund. -- F. J. Raymond -- https://mail.python.org/mailman/listinfo/python-list