Math Is Fun Forum

Hi Eulero;

With parallel lines (AB and CD in this case), a line that is perpendicular to one (eg, as a tangent radius) is perpendicular to both.

Hi;

Those constraints still yield multiple solutions, but I don't know how many there are in total.

Here are twelve of them:

True!

A similar program in BASIC:

    x=1
    y=2
    d=1
    ppd=0
    WHILE d<13
        ppd=ppd+x
        x=x+y
        y=y+1
        d=d+1
    WEND
    PRINT ppd

And...welcome to the forum!

'Flatten' is something I often overlook until I've exhausted all other ways of successfully performing an operation on nested elements.

I'm expert at initiating 'first time' events, like:

- asking a whitegoods service technician why my machine is making an xyz noise: "Sorry, sir, but we've never heard of our machines making an xyz noise before." (maybe I should practise up on making xyz noises over the phone, or send them an mp3 recording of said noise);

- asking Customer Service if there's a fix for this or that: "Oh, we've never been asked about this or that before. Hang on a minute". That's when you discover that your understanding of the length of time a minute takes is way off the mark!

Oh, I see...the word in those posts, not my search word. I sent MIF all the facts that I remembered...

Just stumbled across that. The idea popped into my head that there might be a symbol for product as there is with sigma for summation, and so I started looking.

I learnt the hard way. I lost my right arm after the xth click and had to ask MIF to sew it back on again.

Yes, I knew about censored words, but this one threw me because all I did was click on a search result.

But I clicked it several times, just in case there was some hiccough. If I'd only clicked once (or twice? or thrice?) I may not have been locked out.

I'm deeply honoured to have joined your club - unintentionally!

This is a popular problem!

Other posts that may help:

- thread opened by Enshrouded_, 23rd Sep 2015
- thread opened by championmathgirl, 9th June 2015
- thread opened by SPARKS_CHAN, 30th Jan 2015

I haven't checked out the solutions, but Bob Bundy posted there and he always gives good advice.

Warning! Be careful with threads on this topic earlier than the three above (there are also two threads from 2014). I got locked out from the forum overnight after clicking multiple times on a 2014 post that opened up a 'forbidden access' page. MIF knows about it now, and unlocked me. If you do get a 'forbidden access' page after clicking on a post, don't click that post again.