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Farm Animals!

Math brain teasers require computations to solve.


Puzzle ID:#20263
Fun:*** (2.75)
Difficulty:** (1.73)
Submitted By:eminemfreak69**
Corrected By:cnmne




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

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Jan 07, 2005

You can also just buy,

20 Pigs=$60
80 Chickens=$40
100 animals=$100

Jan 07, 2005

Usually this teaser requires that at least one of each animal is purchased.
Jan 07, 2005

However, that wasn't stated. I did it the same way you did, Slice.
Jan 07, 2005

Make it simple. I bought 10 cows.
Jan 07, 2005

Then you're 90 animals short, castanz!
Jan 07, 2005

lol duh cant only buy ten cows
Jan 07, 2005

Another possible answer is 80 chickens and 20 pigs.
Jan 08, 2005

That's what the first comment said! Duh.
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.
Feb 05, 2005

9 Cows, 3 Pigs, and 2 Chickens is also an acceptable answer.
Feb 05, 2005

Wait, no it's not. My mistake. I forgot about the "exactly 100 animals part"
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!
Jul 19, 2007

how do i make a teaser of my own?
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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