Method 01
Choose the right base
Reverse a discount, combine changes and distinguish a rate change from a percentage-point gap.
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Make the calculation mean something.
Three methods. Twelve original problems. Type an answer, see where the reasoning goes wrong, then apply the method in a different situation.
Method 02
Rebuild counts before rates
Combine unequal groups, find a missing rate and spot a misleading change in the overall average.
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Method 03
Turn revenue into a decision
Work with contribution, whole-unit targets, incremental costs and the value of constrained capacity.
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Useful across numerical and data reasoning. These teaching exercises use typed answers to make you work through the calculation; they are not replicas of either provider’s controls. Original CaseStar material, not official Bain, Sova or TestGorilla questions.