### Brain Teasers

# Farm Animals!

Math
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

The Costs:

Cows: $10 each

Pigs: $ 3 each

Chickens: $0.50 each

### Hint

There's a lot of chickens; over 85, but under 95.### Answer

5 cows=$501 pig=$3

94 chickens=$47

100 animals=100 dollars

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## Comments

You can also just buy,

20 Pigs=$60

80 Chickens=$40

----------------------

100 animals=$100

20 Pigs=$60

80 Chickens=$40

----------------------

100 animals=$100

Usually this teaser requires that at least one of each animal is purchased.

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

Make it simple. I bought 10 cows.

Then you're 90 animals short, castanz!

lol duh cant only buy ten cows

Another possible answer is 80 chickens and 20 pigs.

That's what the first comment said! Duh.

Its easy if you want to think about it, but I didn\'t feel like it today. But it was a good teaser.

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

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

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!

how do i make a teaser of my own?

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.

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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