Farm Animals!
Math brain teasers require computations to solve.
Your objective is to buy exactly 100 farm animals with exactly 100 dollars. You must buy at least 1 of each animal. You may need some paper!
The Costs:
Cows: $10 each
Pigs: $ 3 each
Chickens: $0.50 each
HintThere's a lot of chickens; over 85, but under 95.
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Answer
5 cows=$50
1 pig=$3
94 chickens=$47
100 animals=100 dollars
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Comments
SliceOPi
Jan 07, 2005
 You can also just buy,
20 Pigs=$60
80 Chickens=$40

100 animals=$100

Gizzer
Jan 07, 2005
 Usually this teaser requires that at least one of each animal is purchased. 
I_am_the_Omega
Jan 07, 2005
 However, that wasn't stated. I did it the same way you did, Slice. 
castanz
Jan 07, 2005
 Make it simple. I bought 10 cows. 
Gizzer
Jan 07, 2005
 Then you're 90 animals short, castanz! 
Shaman_Talons
Jan 07, 2005
 lol duh cant only buy ten cows 
verve640
Jan 07, 2005
 Another possible answer is 80 chickens and 20 pigs. 
Araldite
Jan 08, 2005
 That's what the first comment said! Duh. 
i_am_sam007
Jan 23, 2005
 Its easy if you want to think about it, but I didn\'t feel like it today. But it was a good teaser. 
CPlusPlusMan
Feb 05, 2005
 9 Cows, 3 Pigs, and 2 Chickens is also an acceptable answer. 
CPlusPlusMan
Feb 05, 2005
 Wait, no it's not. My mistake. I forgot about the "exactly 100 animals part" 
eminemfreak69
Feb 07, 2005
 OK this is my teaser, and it does say you have to buy at LEAST one of each so people really need to read it and think, i bet a lot of people couldnt figure it out or it took a long time. well idk i hope you all got it! 
Pat3033
Jul 19, 2007
 how do i make a teaser of my own? 
opqpop
Sep 11, 2010
 We know
10a + 3b + 1/2c = 100
a + b + c = 100
Multiply first equation by 2 and subtract the bottom equation to get
19a + 5b = 100.
You can quickly see a = 5 and b = 1 works. Then c = 94 and you're done. 
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