Square me, and the result equals four times my value minus four. What single number am I?
2
Setting up the algebraic equation: x² = 4x - 4. Moving terms to one side gives x² - 4x + 4 = 0, which factors into (x - 2)² = 0. Therefore, x = 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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