Read Mode
Algebra and Equations
A man has some hens and cows. If the number of heads is 48 and the number of feet is 140, what is the number of hens?
Correct answer: B
Explanation and memory cue
Each animal has one head, so hens + cows = 48. Hens have 2 feet and cows have 4 feet, so 2*hens + 4*cows = 140. Solving these equations gives hens = 24 and cows = 24.