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55
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kumar_0119578 loves solving puzzles at PuzzleFry.com. I am proud PuzzleFry member and like my time invested in solving brain teasers.
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F, Since base line is already present.
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- 2 votes
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N*(N+1)/2 sum of n positive integers starting from 1.
so each group sum should be N*(N+1)/2*599*100/10 = 990
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