At what temperature will Celsius and Fahrenheit thermometer readings be equal?

At which temperature, the celsius and Fahrenheit scales coincides?

Which one of the following is the correct relation between Celsius (C) and Fahrenheit (F)?

Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tc)?

Normal temperature of human body on Celsius scale will be (in degree)

Why does water boil at a temperature below 100 degree Celsius at higher altitudes?