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Jane Street Trader Interview Question

"What is the sum of the odd numbers between 1 and 100?"
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Answer

Part of a Trader Interview Review - one of 418 Jane Street Interview Reviews

Answers & Comments

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2500
- Interview Candidate on Jan 24, 2012
0
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Sum(all)=5050, sum(odd)=5050-sum(even)=5050-sum(k=1 to k=50 of 2k)=5050-2*50*51/2=5050-2550=2500
- Anonymous on Feb 1, 2012
0
of 0
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(1+99)*50/2=100*25=2500
- Anonymous on Sep 25, 2013

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