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wickerwoman Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:20 PM
Original message
Your Saturday afternoon math story problem:
Dried chickpeas cost $7.20/kg. A kilogram has 3640 calories. How do you find out how much 100 calories of chickpeas cost?

First prize is a tub of virtual hummus.

:loveya:
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madeline_con Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:21 PM
Response to Original message
1. Divide 7.20 by 364?
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wickerwoman Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:39 PM
Response to Reply #1
2. ?
Sorry, I know I'm being impossibly thick here.

So to get grams/100cal you divide 3640/10 or 100? (which? why?) Where does the 364 come from?

And then you divide the price/kg by the g/100 cal?

Can you talk me through the formula in terms of what is being divided into what? I have to write an excel formula for this and it's making my brain melt.
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Rabrrrrrr Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:53 PM
Response to Reply #2
7. Don't be confused, that answer is wrong.
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nuxvomica Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:44 PM
Response to Original message
3. (7.2/3640)*100
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wickerwoman Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:48 PM
Response to Reply #3
4. That makes sense. Cheers!
Hummus for you:
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nuxvomica Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:51 PM
Response to Reply #4
6. mmmmmm....
What problem do I have to solve for some baba ganoush? :D
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wickerwoman Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:59 PM
Response to Reply #6
8. Ratio of the average volume of Italian vs. Japanese eggplants expressed in base 4
;)

We don't just give that stuff away.
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nuxvomica Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 04:10 PM
Response to Reply #8
10. Sorry. I would have to chop off six of my fingers to solve that.
I am not very good at the math, you see.
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Rabrrrrrr Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 03:50 PM
Response to Original message
5. Oh, that's easy -
7.20 $/kg * 1/3640 kg/calories * 100 calories = some number in the form of $.
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wickerwoman Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Oct-17-09 04:03 PM
Response to Reply #5
9. Thanks Rabrrrrrr!
http://3.bp.blogspot.com/_QBXXTubIFKI/SWwMfLLE4gI/AAAAAAAAAMc/A8YS0ppnC6s/s320/tjs+hummus.JPG
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