1953 AHSME Problems/Problem 1
A boy buys oranges at for cents. He will sell them at for cents. In order to make a profit of , he must sell:
The boy buys oranges for cents or orange for cents. He sells them at cents each. That means for every orange he sells, he makes a profit of cents.
To make a profit of cents, he needs to sell
The boy buys oranges for cents. He sells them at for . So, he buys for cents and sells them a for cents, so he makes cents of profit on every oranges. To make cents of profit, he needs to sell , or oranges.