Quant interview prep guides

Mental Math Peer Practice Guide

Mental math peer practice guide for roles, timed sets, verbal arithmetic, feedback, retesting, and study-group structure.

Candidates practicing arithmetic with study partners or groups.

Assign roles

One person gives prompts, one solves aloud, and one records feedback if the group has three people. Rotate roles to keep practice balanced.

Make arithmetic verbal

The candidate should explain decomposition and checks, not just give numbers. Peer practice is useful because it makes silent habits visible.

Concrete session

Run ten timed arithmetic prompts, review misses by category, then rerun three similar prompts to test whether feedback changed behavior.

Keep feedback observable

Useful feedback names a behavior: skipped denominator, mixed units, rushed sign, or no sanity check. Avoid vague judgments.

Common mistakes

Peer groups often drift into casual quizzing. Keep timing, categories, and retests explicit so the session improves performance.

Practice the pattern

Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.