RocketBlocks

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Case interview math problems on the go!

Mental math is a critical part of success in case interviews. And the RocketBlocks Math App helps you build these critical skills so you shine on interview day. With easy, mobile access to realistic case math problems, you can practice anytime you've got a free minute - whether it's between classes or on the bus.

• Features *

• Unlimited, realistic case mental math drills
• Super simple UI - no fluff!
• Track your speed and accuracy
• Compare your performance to system wide benchmarks
• 11 different types of math problems
• Optional daily reminder to practice a 5-problem math set - we'll help you remember to practice!

• 11 Different Problem Types *

• Grab Bag — a random mix of all types
• Big Multiplication (e.g., 100k * 200)
• Big Division (e.g., 200M / 4K)
• Small Multiplication (e.g., 300 * 700)
• Percentages (e.g., 45% of 150M)
• Percent × Percent (e.g., 20% of 90%)
• Market Math (e.g., If $5M is 10% of the market, how big is the total market)
• Break Evens (e.g., If you sell a widget at $200, it costs $180 to make...)
• Growth Estimations (e.g., $2M growing at 10% for five years...)
• Time Series Conversions (e.g., If a company makes $1.5M per week, it makes how much per year )
• NPV Calculations (e.g., Annual cash flow is 2M, the discount rate is 5% and growth is flat...)

• About RocketBlocks * Built by former McKinsey, BCG, Bain, and Google employees. Trusted by 100,000+ candidates at top MBA programs and undergraduate schools worldwide, including leading institutions like Stanford GSB and Harvard Business School.