If there are 5 birds on a tree branch and each bird has 2 legs. There are number of legs on the branch.
In a pet shop, there are cats and birds. If heads are counted, there are 200 and of legs are counted, there are 580. How many birds are there?
A man visited a pet shop, and found only cats and birds. He counted a total of 200 heads and 580 legs. How many birds are there in the pet shop?