Case 7: Mental Math Drills – Rule of 72, % of % and Growth
This lesson is part of the course
In this lesson
You check four classic mental-math shortcuts against the exact Excel answer: the rule of 72, an exact doubling time, a percentage of a percentage and two changes in a row.
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Lessons in this course
- Case 1: Market Sizing Top-Down (Population × Penetration × Frequency × Price) Locked
- Case 2: Bottom-Up Sizing and the Sanity Check Locked
- Case 3: The Profitability Tree – Find What Drove the Decline Locked
- Case 4: Break-Even and Payback for a Product Launch Locked
- Case 5: Pricing from a Willingness-to-Pay Survey Locked
- Case 6: M&A Quick Case – Do the Synergies Pay for the Premium? Locked
- Case 7: Mental Math Drills – Rule of 72, % of % and Growth Locked
- Case 8: Read the Exhibit – Chart Interpretation Locked