I have no edges, no corners, and no straight lines. If you place me immediately to the right of any whole number, you multiply its value by ten, but if you multiply that whole number by me, nothing remains. What number am I?
Zero (0)
Placing a zero to the right of an integer appends a digit, increasing its value tenfold (e.g., 5 becomes 50), while multiplying any number by zero yields zero.
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: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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