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Sum (expression) = 10*n (Posted on 2011-02-22) Difficulty: 3 of 5
Determine all possible positive integer values of n that satisfy this equation:
Σj=n

j=1
(x+j-1) (x+j) = 10*n

whenever x is an integer.

Note: For a desired value of n, the above equation holds true for at least one value of x.

See The Solution Submitted by K Sengupta    
Rating: 3.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(3): Possible solutionDaniel2011-02-23 11:41:08
re(2): Possible solutionbroll2011-02-23 07:44:24
re: Possible solutionbrianjn2011-02-23 07:31:29
Possible solutionbroll2011-02-23 07:08:40
So longbrianjn2011-02-22 20:27:02
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