Rotational Engineer Interview Questions

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Two players play a multiplying game. Each player multiplies the current number by any number from 2 to 9 (inclusive) and owns the number. The first player to reach a number larger than 1000 wins. For example, I start with number 2. I decide to multiply by 7 (I could have chosen any multiplier from 2 -9). Player B now starts with 14 and can choose any multiplier. If player B chooses to multiply by 2 the new number is 28. That is now my number for the third round. What is your strategy to guarantee that you will win?
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Infrastructure Rotational Analyst

Interviewed at Jane Street

4.4
Nov 22, 2019

Two players play a multiplying game. Each player multiplies the current number by any number from 2 to 9 (inclusive) and owns the number. The first player to reach a number larger than 1000 wins. For example, I start with number 2. I decide to multiply by 7 (I could have chosen any multiplier from 2 -9). Player B now starts with 14 and can choose any multiplier. If player B chooses to multiply by 2 the new number is 28. That is now my number for the third round. What is your strategy to guarantee that you will win?

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