I am a three-digit prime number. My middle digit is zero, and my first and last digits add up to 10. My first digit is greater than my last. What am I?
703
The digits add to 10 with a middle of 0, so the first and last are either (9,1), (8,2), (7,3), or (6,4). 901 is divisible by 17. 802 is even. 703 is prime (not divisible by 2, 3, 5, or 7). 604 is even.
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: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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