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An octopus has 8 tentacles and 1 head. A jellyfish has 20 tentacles and no head. A cow has 4 legs and 1 head. Farmer Brown, who only raises octopi, jellyfish and cows on her farm, has animals with a total of 17 heads, 196 tentacles and 20 legs. How many animals does she have?

 May 17, 2021

Best Answer 

 #2
avatar+32691 
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since there are 17 heads there are 17 animals so far in our count

   20 legs means 5 cows

      then   there are   17-5 = 12 octipi

             196 tentacles    12 octipi * 8 = 96 tentacles are octipi   the remaining tentacles are jellyfishes 196 - 96 = 100

                             100 / 20 = 5 jellyfish

 

total 22 animals

 May 17, 2021
 #1
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Farmer Brown has a total of 24 animals.

 May 17, 2021
 #2
avatar+32691 
+2
Best Answer

since there are 17 heads there are 17 animals so far in our count

   20 legs means 5 cows

      then   there are   17-5 = 12 octipi

             196 tentacles    12 octipi * 8 = 96 tentacles are octipi   the remaining tentacles are jellyfishes 196 - 96 = 100

                             100 / 20 = 5 jellyfish

 

total 22 animals

ElectricPavlov May 17, 2021

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