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Dhaka Secondary 2010/12

Posted: Fri Jan 21, 2011 7:07 pm
by BdMO
From $1$ to $300$, how many integers are multiples of $2$ or $3$ but not of $8$?
similar: viewtopic.php?f=42&t=378

Re: Dhaka Secondary 2010/12

Posted: Tue Jan 25, 2011 12:54 pm
by leonardo shawon
answer: 213

Re: Dhaka Secondary 2010/12

Posted: Sat Aug 10, 2013 7:26 am
by harrypham
leonardo shawon wrote:answer: 213
Could you please show me your solution ? Thank you.

Re: Dhaka Secondary 2010/12

Posted: Tue Jan 14, 2014 5:12 pm
by mission264
shouldn't this be 163?
$\lfloor \frac{300}{2} \rfloor + \lfloor \frac{300}{3} \rfloor - \lfloor \frac{300}{6} \rfloor - \lfloor \frac{300}{8} \rfloor=163$

Re: Dhaka Secondary 2010/12

Posted: Tue Jan 14, 2014 5:14 pm
by mission264
and you put wrong link as 'similar'. i think that should be this viewtopic.php?f=42&t=378

Re: Dhaka Secondary 2010/12

Posted: Tue Jan 14, 2014 7:25 pm
by *Mahi*
mission264 wrote:and you put wrong link as 'similar'. i think that should be this viewtopic.php?f=42&t=378
Fixed it, thanks for pointing out!