I am a four-digit number with no repeating digits. Multiply me by 4, and the resulting product is my original digits in exact reverse order. What number am I?
2178
2178 * 4 = 8712, which is 2178 written in reverse.
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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