![]() Looking to Break into the Hedge Fund World? ![]() Read more about resources to work on mental math skills on another WSO thread. User a hedge fund analyst, shared a good website for working on your mental math skills. So now just move the decimal over, and I would have your answer as "about 45" and its basically very close and I would imagine that's all they expect. Approximate and say the square root of 20 is 4.5. The square root of 20 would be in between 4 and 5, because obviously 4 squared is 16 and 5 squared is 25. The nearest perfect squares are 16 and 25. So for 2,000 I would look first at what the square root of 20 could be (obviously just approximate). StudentLoanBackedSecurity:Think of the nearest perfect squares. This process becomes much more simple with smaller problems. Finally, we need to add back the additional amount that we subtracted so (40 - 37) * 242 = 726.Since we rounded up we need to subtract away (200 - 163) * 242.You should follow the advice broken down below and practice some mental math problems during your spare time.įor complex multiplication problems: one effective way to solve problems is to round one of the numbers you are working with to make it a multiple of ten and then add or subtract the difference. The best way to work on your mental math skills is practice. What's the best way to break down problems like 1916*1912 or the square root of 2000? Practice Solving Mental Math Interview Questions I've heard that certain banks including Centerview ask you to do 4 digit multiplication or square roots.
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