Bacon and Eggs: Lauren’s latest entrepreneurial venture is raising Vietnamese pot-belly pigs and ostriches for fun and profit. Among her animals, she has 17 heads and 56 legs in all. How many pigs and how many ostriches does Lauren have?
Answer: Lauren has 11 pigs and 6 ostriches.
Here’s how: Each animal has two hind legs, so 17 heads means 34 hinds legs total; the remaining 22 legs must be the front legs of 11 four legged pigs. Therefore, 11 heads belong to pigs, and the remaining 6 heads belong to the ostriches.