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Number system + Stats

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Number system + Stats

Post
Is the sum of X consecutive numbers zero?
(1) The largest number is 5.
(2) The median number is zero.

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Senior | Next Rank: 100 Posts Default Avatar
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I think B.

1) Tells us nothing about X. - Insufficient

2) Tells us that the series is centered on 0, so sum of terms must also equal 0 regardless of X.

e.g.

sum: -2,-1,0,1,2 =0
sum: -4,-3,-2,-1,0,1,2,3,4 = 0

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Senior | Next Rank: 100 Posts Default Avatar
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I missed the term "consicutive" in question. Thanks for ur solution.

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