In this video I solve an Oliver Wyman-style numerical reasoning test. I cover equations, probability, geometry, compounding, and some other question types. The video is long, so feel free to save the link for future reference and watch in several sittings.

The test is a challenge since you have only 30 mins to deal with all the questions I cover in this long video. So practice. Pause the video on each question, try to solve it on your own, and only then watch the solution.

If you have any comments, please share. And please like it if you find my video useful!

Known mistakes fixed:

00:02:43 My interpretation of Insta’s growth is wrong (thanks to Elchin Karimov for pointing out). Insta’s downloads increase is not 10k but rather [prev. month increase] + 10k. That means the following dynamics: J 300, F 310, M 330, A 360, M 400, J 450, J 510 and so on.

00:04:08 Given previous comment, my calculation of Clapchat’s downloads in April need to be more precise: not ~330+/-10, but ~345. Then it becomes obvious that Clapchat’s May value overtakes Insta (345*1.2 is greater than 400). Hence the answer is (B) May

( Please report other dubious points )

CONTENTS

00:00:58 Question types you will see in an Oliver Wyman test

00:01:24 Part 1 – Equations

00:28:10 Part 2 – Probability & Combinatorics

01:02:24 Part 3 – Geometry

01:21:24 Part 4 – Compounding

01:28:35 Part 5 – miscellaneous

MATERIALS & USEFUL LINKS

Consulting Math Course

Oliver Wyman interview prep

Sample OW test questions

Other consulting tests prep

Rule of 72

Compounding