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Top Questions
11 votes

A self-referring number

calculation-puzzle asked Apr 13, 2015 at 13:32
puzzling.stackexchange.com

10 votes

A number and its square

calculation-puzzle asked Apr 13, 2015 at 15:11
puzzling.stackexchange.com


Top Answers
12
For which numbers does the order of reversing their digits and squaring not matter?
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12
Sum of secret numbers is 101
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9
Determine $X$ and $Y$: sum, difference and ratio
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8
How to maximize your wages?
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7
Confused clock face puzzle
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7
An unusual and very hard number sequence problem
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6
Ernie and the Alien Invasion
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5
Enlightened, Part II: A Curious Courtyard
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