## -40 Degrees is the Temperature Where the Fahrenheit and Celsius Scales Meet (-40°F = -40°C)

Negative forty degrees is the temperature where the Fahrenheit and Celsius scales correspond with one another (-40°F = -40°C).  Forty is also considered a semi-perfect number owing to the fact that a subset of its divisors added together gives 40 (i.e. 1, 4, 5, 10, and 20).

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• I thought your article about “40” being the perfect number was pretty interesting. However,..forty isn’t a perfect number.the divisors are as follows; (1,4,5,10,20…..& 2!)

Add all those and they equal 42.

Anyways- it was cool while it lasted.

Have a good day.

• We also can’t forget 8…. Making the total 50.

• Edward Power

He said “semi-perfect”…

• He said subset.

• Genevieve117

Actually, he said both. Read it again.

• Perry Pettinato

Also 8 so it adds up to 50

• half perfect is pretty far from perfect

• even 40 is a divisor of 40
(40 / 40) = 1
totals up to 90.

• holy sheets nerds… dreamt of quadratics in high school… but damn this in new level

• stacie Crouch

Good Grief y’all, All you can do is come down on the guy. Have some manners.. Be nice

• Sama Ebraheem Baloch Baloch

but why is -40 degrees fahrenheit the same as Celsius?