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CAT Question: Remainder when 104^303 is divided by 101?



Let's look at FERMAT's LITTLE THEOREM before we proceed to answer to this....


Let P be any prime number and N be a number which is not divisible by P.


Then the remainder obtained when N(P-1) divided by P is 1.


So applying this rule here ( since 101 is prime) and 104 is not divisible by 101,


we can write the given number as


(104100)3 x (1043)



and (104100)3 leave a remainder 1 according to Fermat's rule. (i.e 104100 gives rem 1)


So now the problem finally becomes 1043 which leaves remainder 27 when divided by 101.


I hope I am clear.

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  1. shaky20 saidMon, 13 Oct 2008 13:31:44 -0000 ( Link )

    wow gr8 concept

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  2. silverbird saidFri, 07 Nov 2008 20:08:27 -0000 ( Link )

    good one… buddy :)

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  3. shwetaa sharma saidFri, 05 Dec 2008 08:23:40 -0000 ( Link )

    good but better give few more examples..

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  4. akkshaya saidThu, 22 Jan 2009 13:36:46 -0000 ( Link )

    superb concept

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  5. spiyr saidSat, 16 May 2009 09:52:14 -0000 ( Link )

    understood late,but got it

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  6. Aaragorn1984 saidSat, 16 May 2009 14:37:28 -0000 ( Link )

    Did you use a formula/concept for obtaining the remainder for 104^3/101?

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  7. swapie saidThu, 02 Jul 2009 14:04:15 -0000 ( Link )

    gud 1 bro :)

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