I am an odd number containing three digits. All of my digits are different. My tens digit is the product of my hundreds and units digits, and my total sum of digits is 12. What am I?
318
Digits are 3, 1, and 8. Sum is 3+1+8 = 12. The tens digit (1) does not equal 3*8. Let's replace this item with a solid valid one: 'I am a number between 1 and 100. My square root is an integer, and if you add 15 to me, the result is the square of a consecutive integer.' Answer: 49.
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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