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You have 9 digits 1-9. Partition them into two sets S1 and S2. Make a number (any) using the digits of partition S1. Call this x. Similarly do it for S2. Call it y. the product p=xy. What should the numbers x and y be to maximize p.
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Research Analyst

Interviewed at WorldQuant

4.2
Mar 14, 2011

You have 9 digits 1-9. Partition them into two sets S1 and S2. Make a number (any) using the digits of partition S1. Call this x. Similarly do it for S2. Call it y. the product p=xy. What should the numbers x and y be to maximize p.

1. 100 students, make survey cheat/not cheat, student toss a coin, if head, tell truth, if tail, toss again, if Head then yes, if tail then no. 30 students answer yes, Q: how many student cheated? 2. Given an array, use bootstrap method to get the var of mean (I used R). 3. Can you write 2 in one line within function? ( so use apply() )
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Quantitative Analyst

Interviewed at Google

4.4
Apr 20, 2016

1. 100 students, make survey cheat/not cheat, student toss a coin, if head, tell truth, if tail, toss again, if Head then yes, if tail then no. 30 students answer yes, Q: how many student cheated? 2. Given an array, use bootstrap method to get the var of mean (I used R). 3. Can you write 2 in one line within function? ( so use apply() )

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