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If 100 bushels of corn are distributed among 100 people in such a manner that each man has 3 bushels, each woman 2 and each child 1/2, how many men, women and children are there?

40 replies

barbarianoftheuniverse · 20/01/2008 17:35

?

OP posts:
themoon66 · 20/01/2008 17:42

Now you see it's being faced with this kind of question at the tender age of 7 or 8 that made me the maths phobic I am today.

barbarianoftheuniverse · 20/01/2008 17:45

I cannot do it either but I blamed the music score/ hideous cacophony of MIHigh and came here to ask.

OP posts:
Pruners · 20/01/2008 17:46

Message withdrawn

Milliways · 20/01/2008 17:46

200 children

colditz · 20/01/2008 17:46

10 men, 15 women, 20 children

colditz · 20/01/2008 17:47

Oh no, it doesn't work like that, does it!

barbarianoftheuniverse · 20/01/2008 17:48

No not equal numbers of each but a total number of 100 receivers.

OP posts:
KatyMac · 20/01/2008 17:49

3+2+1/2 times x = 100
so
5.5x=100
so
100/5.5 = 18 of each with 1 left over?

or 18 men, 18 women & 20 children?

Oh I don't know either

differentYearbutthesamecack · 20/01/2008 17:49

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donbean · 20/01/2008 17:50

isnt it 100?
It says in the title 100 people.

donbean · 20/01/2008 17:52

oh doh, i see.
you have to divide.
tis very hard..

let me have a think...

Pruners · 20/01/2008 17:52

Message withdrawn

Boredveryverybored · 20/01/2008 17:56

But none of them equate to 100 people Pruners. I thought that first aswell.

Blu · 20/01/2008 17:57

2 men
30 women
68 children

2 men with 3 bushells eac = 6
30 women x 2 bushells each = 60
68 children x .5 bushells = 34
Total - 100 people, 100 bushells.

Pruners · 20/01/2008 17:57

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dejags · 20/01/2008 17:58

I also thought 100 - it says so in the question?

PandaG · 20/01/2008 18:01

blu - how did you work it out? am sitting here with 2 equations, and cannot get any further...

barbarianoftheuniverse · 20/01/2008 18:01

Blu, how on earth did you do that?

(Bows down in homage)
This problem can from Problems for the Quickening of the Mind by Alcuin of York (ca. 775)

OP posts:
Pruners · 20/01/2008 18:01

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dilbertina · 20/01/2008 18:03

no cos there are 100 people. I reckon...
76 children = 38 bushels
14 men = 42 bushels
10 women = 20 bushels

so 100 people & 100 bushels

differentYearbutthesamecack · 20/01/2008 18:04

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dilbertina · 20/01/2008 18:05

ok so I type slow....but shows there is more than one correct answer...

RustyBear · 20/01/2008 18:06

Men 17 = 51 bushels
Women 5 =10 bushels
Children 78 = 39

Dh says there is not a single answer - it's a diophantine equation

dilbertina · 20/01/2008 18:06

I like these...give us another

Blu · 20/01/2008 18:07

I didn't do it according to an equation - I worked out that a woman and two children had the same number of bushells as one man, so had a guess proportionately, was out by 20, so reduced proportionately, and had it right by the 3rd try.

But as Dilbertina shows, there must be many variations?