I am a number whose square plus my double equals 35. What positive number am I?
5
Let the number be X. X² + 2X = 35. Testing X = 5: 5² + 2(5) = 25 + 10 = 35.
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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