A certain number of horses and an equal number of men are going somewhere. Half of the owners are on their horses' back while the remaining ones are walking along leading their horses. If the number of legs walking on the ground is 70, then how many horses are there?
(a)10
(b)12
(c)14
(d)16
Answer
Answer (as printed): C
Explanation
Let the number of horses be $x$. Then, number of men $=x$. $$\therefore \quad 4 x+\frac{x}{2} \times 2=70 \Leftrightarrow 5 x=70 \Leftrightarrow x=14 .$$
Explanation as extracted from the printed page; notation may be imperfect.