Converting Temperatures
Source: AIME I 2007 #5
March 15, 2007
AMCAIMEnumber theory
Problem Statement
The formula for converting a Fahrenheit temperature to the corresponding Celsius temperature is . An integer Fahrenheit temperature is converted to Celsius and rounded to the nearest integer; the resulting integer Celsius temperature is converted back to Fahrenheit and rounded to the nearest integer. For how many integer Fahrenheit temperatures with does the original temperature equal the final temperature?