no then 1+2+4+8=15, so it could also be unique, there are n numbers, which follow the above pattern, and there are also other degrees of temp. between 1 and a million like water boils at 100 deg Celsius etc to be unique, so why among 1 to a million 40 can be unique by your statement......But well done for giving knowledge about 40.

@Baidehi Chattopadhyay
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hey you are right, but it firstly is -40 not 40 k by this logic any one can cross question you why 40 only why not any other number at some other respect...as simplest one there are only 60 seconds in a minute so 60 must be unique among 1 and a million, think about something logically not scientifically ........

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TopNewest40=1+3+9+27?? Or how about -40 degree being the unique temperature at which Celsius and Fahrenheit scales correspond? :P

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no then 1+2+4+8=15, so it could also be unique, there are n numbers, which follow the above pattern, and there are also other degrees of temp. between 1 and a million like water boils at 100 deg Celsius etc to be unique, so why among 1 to a million 40 can be unique by your statement......But well done for giving knowledge about 40.

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Ohh...but -40 degree is the only temperature at which celcius and farenheit become equal ....right?

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The answer is only 40 is the number when written alphabetically then have ordered alphabets as forty

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What? Didnt get you

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The number 40 (Forty) is the only number which when written in English has all the letters in the same order as in the alphabets.

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