MathDB
Fahrenheit and Celsius

Source:

March 16, 2010

Problem Statement

One day, the temperature increases steadily from a low of 45F 45^\circ \text{F} in the early morning to a high of 70F 70^\circ \text{F} in the late afternoon. At how many times from early morning to late afternoon was the temperature an integer in both Fahrenheit and Celsius? Recall that C \equal{} \frac {5}{9}(F \minus{} 32).