I am a number cube. If you sum all of the numbers that are NOT printed on my visible faces when I sit on a table, you get 15. What number is printed on the bottom face touching the table?
6
The sum of numbers 1 through 6 is 21. If the hidden faces sum to 15, the remaining hidden face (the bottom) must be 21 - 15 = 6.
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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