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Subtraction


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64 replies to this topic

#11 ggsarah

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Posted 12 July 2007 - 03:11 PM

ha its good one though but im lost on the Cookie and Books now, can u not b able to fit in loads not just 1?..
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#12 mathemagister

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Posted 14 July 2007 - 10:34 AM

When you eat one cookie your tummy is no longer empty. When you put in 1 book, the bag is no longer empty.
Geddit now?
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#13 misguidedmonkey

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Posted 18 July 2007 - 07:42 PM

Only once.
After 2 is subtracted from 32, it becomes 30. But we're not subtracting 2 from 30, now are we?
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#14 newton

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Posted 25 July 2007 - 07:09 PM

This isn't a riddle - it's just stupid.
But even if it were a little more clever, there are so many "correct" answers (infinite, once b/c then it's 30, once b/c then all you have is a 3...) that there's no way to know which one is ultimately going to be considered the right answer.
Don't get me wrong, most of the riddles on this site are good - this one is just so below par I felt compelled to criticize.
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#15 rookie1ja

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Posted 25 July 2007 - 07:55 PM

This isn't a riddle - it's just stupid.
But even if it were a little more clever, there are so many "correct" answers (infinite, once b/c then it's 30, once b/c then all you have is a 3...) that there's no way to know which one is ultimately going to be considered the right answer.
Don't get me wrong, most of the riddles on this site are good - this one is just so below par I felt compelled to criticize.


I like the riddle. I like putting this type in between deep logic puzzles - just to remember you that some things are quite simple
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#16 ptown123

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Posted 26 July 2007 - 03:36 PM

There is one idea no one has considered. Consider 32 as the magnitude of a vector. If you think about 2 as the magnitude of another vector, then subtracting can result in a vector with magnitude between 30 and 34 inclusive. Using this logic, there are 2 vectors of length 2, which when subtracted from the vector of magnitude 32 result in another vector of magnitude 32. This means you could subtract different vectors of magnitude 2 from many vectors of magnitude 32 an infinite number of times.

I realize this is not the point of the riddle. I just thought it might be interesting.
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#17 segee girl

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Posted 12 August 2007 - 01:55 AM

16!!!! OBVIOUSLY, IF YOU TAKE THE TIME TO DO THE MATH THAT IS THE ANSWER.
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#18 JASON4P8C10

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Posted 30 August 2007 - 03:18 AM

only once after you subtract 2 from 32 it isn't 32 any more

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ahhh i hate when there are 2 page and i dont notice
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#19 vivaciousmel

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Posted 31 August 2007 - 03:30 PM

i do love how my brain will go: it should be this... hang on wait a minute that can't be right...

you can only 2 from 32 once
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#20 BoilingOil

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Posted 26 September 2007 - 06:42 PM

I've fallen for this one once, but that was a long time ago... Ofcourse you can subtract 2 from 32 only ONCE, since after that, it's no longer 32 you're subtracting from


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