Mental Math Drills by Topic
Mental math drills by topic for fractions, percentages, expected value, probability, statistics, and market-making arithmetic.
Candidates repairing specific arithmetic categories.
Choose drills from misses
The best drill topic is the one your error log shows repeatedly. Topic selection should follow evidence, not what feels most familiar.
Core drill buckets
Use separate buckets for fractions, percentages, multiplication, division, expected value, probability, statistics, and quote arithmetic.
Concrete example
If three recent misses involved denominators, run fraction and probability denominator drills before doing another mixed mock.
Mix after repair
Focused drills repair mechanics. Mixed drills verify that the mechanic works when the problem context changes and time pressure returns.
Common mistakes
Candidates often do only mixed practice and never isolate the weak calculation. Focused repair is faster when the error category is clear.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.