the houses in a row are numbered consecutively from 1 to 49 show that there exists a value of x such that sum of numbers of houses preceding the house numberd x is equal to sum of the numbers of houses following x
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1+2+3+.........+34,X,36+.......49
X=35
X=35
adarshkarn2002:
I don't understand the answer will you please
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sum of 1 to 34 is equal to sum of 34 to 49.middle one is 35
sum of 1 to 34 is equal to the sum of 36 to 49.middle one is 35
thanks a lot
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