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?
+36916 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
+36916 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
