I am a three-digit number. My hundreds digit is three times my units digit, my tens digit is the sum of my hundreds and units digits, and the sum of all three of my digits is 16. What number am I?
682
Let the units digit be u. The hundreds digit is 3u, and the tens digit is 3u + u = 4u. The total sum of digits is 3u + 4u + u = 8u. Setting 8u = 16 yields u = 2. Thus, the digits are hundreds = 6, tens = 8, and units = 2.
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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