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Find a quicker way to add the number 1to42(with equation)?

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Find a quicker way to add the number 1to42(with equation)?

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  1. total number= a+b

    total num.= 1+42

    total num.= 43


  2. Sum = N(N+1)/2;   Sum of first N natural numbers :-o)

    So, your sum is (42*43)/2 = 903.

    I hope this is what you were looking for.
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