I am the only number whose spelling in English has its letters arranged in strict alphabetical order. What number am I?
Forty
Spelled F-O-R-T-Y, the alphabetical positions of its letters are 6, 15, 18, 20, and 25, which strictly increase. No other standard English number word shares this property.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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