How many 4 digit palindromes contain both the digits 1 and 2

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asked Nov 20, 2016 120k views

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How many 4 digit palindromes contain both the digits 1 and 2

Mathematics
middle-school

Ali Bayat asked

by Ali Bayat

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1 Answer

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What a clever sneaky little problem !

There can only be two of them: 1221 and 2112 .

Johnstaveley answered Nov 24, 2016

by Johnstaveley

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