Dataford
Top 50
Topic roadmap
Updated weekly · Last refresh Sep 13

Top 50 mental math Interview Questions

The most frequently asked mental math questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~7htotal time
192companies covered
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
Behavioral & LeadershipStart here. 18 questions · ~151 min
Correcting a Simple Analytical MistakeEasy
Recently asked

Tests ownership and communication when correcting an avoidable analytical error under time pressure.

mental mathtechnicalquantitative problem solvingDominion EnergyBeta TechnologiesMcAfee
Handling Pressure in Mental MathEasy

Tests quantitative problem solving under pressure, plus communication, recovery from mistakes, and self-awareness.

time managementmental mathquantitative problem solvingCircle KIntercontinental Exchange HoldingsSusquehanna International Group
Explaining Fast Mental MathEasy

Tests quantitative problem solving under pressure, plus communication and judgment in explaining a fast mental calculation clearly.

currency conversionmental mathquantitative problem solvingKoch Minerals & TradingSusquehanna International Group
Explaining a Simple Math MissEasy

Tests ownership and communication after a basic quantitative error, including how you recover trust and improve your process.

brain teasermental mathlogical deductionSusquehanna International Group
More Behavioral & Leadership questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
2
Statistics & Probability17 questions · ~143 min
Simple Percentage CalculationEasy

Compute 15% of 300 using basic percentage arithmetic.

mental mathpercentagesarithmeticathenahealthCobblestone Energy
Mental Multiplication Under Time PressureEasy

Compute 18 times 15 mentally and show a clean arithmetic shortcut.

multiplicationmental matharithmeticCobblestone Energy
Simple Decimal DivisionEasy

Compute a basic decimal division and interpret what the quotient means.

mental matharithmeticdivisionCobblestone Energy
Mental Square Using AlgebraEasy

Compute 67 squared mentally using a simple algebraic identity and verify the result.

Estimationmental matharithmeticCobblestone Energy
More Statistics & Probability questions with a free account
3
Strategy6 questions · ~50 min
More Strategy questions with a free account
4
Metrics4 questions · ~34 min
More Metrics questions with a free account
5
More topics5 questions · ~42 min
More questions with a free account
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Writing SAS Code Under PressureMedium
Practice
Practice drill

Identify missing, unexpected, duplicate, and inconsistent derived records using PostgreSQL validation queries.

Codingdata accuracydata verificationCCytel Inc
Rolling 30-Day Average Equipment UsageMedium
Practice
Practice drill

Calculate daily equipment usage and its 30-day rolling average while handling multiple readings and NULL values.

Date FunctionsData AnalysiscalculationsEEcolab
SQL for Recruitment Conversion by DepartmentMedium
Practice
Practice drill

Calculate UiPath hiring conversion rates by department using LEFT JOIN, conditional aggregation, and date filtering.

Conversion Ratesql queryData AnalysisUiPath
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.