Mental Math Flashcards for Quant Interviews
How to use mental math flashcards for quant interviews without replacing problem solving, including what to memorize and how to review.
Candidates considering flashcards for fractions, percentages, and shortcuts.
Flashcards are for benchmarks
Use flashcards for common fractions, percentages, squares, powers of two, and conversion landmarks. Do not use them as a substitute for reasoning.
Review with spacing
Short spaced sessions beat cramming. Cards should return often enough to become automatic but not crowd out applied practice.
Concrete card types
Useful cards include 3/8 to percent, 2^10, square root of 50 approximate, and common percentage decompositions like 15 percent.
Add context drills
After memorizing a benchmark, use it inside probability, EV, or estimation prompts. The interview skill is applying the benchmark.
Common mistakes
Candidates often memorize many cards but cannot use them in problems. Keep the deck small and tied to recurring interview arithmetic.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.