narendrasony

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About narendrasony

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  1. narendrasony added a post in a topic   

    Beautiful problem. Answer is :



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    =W=,
    You are right. By method of elimination these are the only possible solutions. Merry Chrismas.
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  8. narendrasony added a post in a topic   

    General rule :
    Let the number be : 1234567890123.... with "n" digits. Here it is a repetative pattern of m=10 digits.
    The general answer to this puzzle is 2^k (mod m) such that n >= 2^k > n/2 (>= is greater or equal).

    For this particular puzzle n=4000 and m=10. Then value of k such that 4000 >= 2^k > 4000/2 is k=11 , 2^k =2048 and answer is 2048(mod 10) = 8.
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