Question 539251
old Mcdonald has 15 goats and chickens on his farm. the animals combined have a total of 34 legs. assuming there are no physical defects, how many of each animals are on the farm
<pre>
34 legs amounts to 17 pairs of legs.  All 15 animals have a pair of front legs,
so the extra 2 pairs of legs are hind legs so they belong to 2 goats.  So there
are 2 goats and 13 chickens. 

Edwin</pre>