Spelled out in English words, which positive integer has all of its letters arranged in strict alphabetical order?
40 (Forty)
The word 'FORTY' consists of letters F-O-R-T-Y, which appear in alphabetical order. No other English number name possesses 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: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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