Multiple choice general knowledge Centigrade & Fahrenheit scales give same reading at : 40° 32° 273° 100° Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Celsius and Fahrenheit temperature scales intersect at exactly -40 degrees, meaning -40°C = -40°F. This can be verified using the conversion formula F = (9/5)C + 32. At -273° (absolute zero), the readings are very different.