FiveMinuteFox: Mental Math

22 of 30 levels free. No account required, no ads. Just open, play, and feel smarter at work and interviews, size up deals in real-time at lunch meetings, on the golf course, or at conferences.

Built by a finance professional with 24 years of experience who has interviewed hundreds of analyst candidates. This is the daily mental math training that separates successful business leaders from everyone else.

HOW IT WORKS
Complete 100 questions daily whenever you have 5 minutes. The app starts at Level 1 each day as a warm-up, then automatically progresses through 30 levels of increasingly challenging content.

30 PROGRESSIVE LEVELS
• Levels 1-5: Arithmetic warm-up and multiplication up to 20x20
• Levels 6-10: Progressive multiplication practice
• Level 11: Addition estimation
• Levels 12-20: Progressive division practice and percentages
• Levels 21-22: Hard multiplication and division
• Levels 23-30: Specialized business context practice, including corporate finance, real estate, IRR/MOIC, private equity, and fixed income

KEY FEATURES
• Daily practice with streak tracking
• Multiple estimation techniques for each problem
• Detailed explanations showing various solution methods
• Practice Mode for targeted skill building
• Customizable settings and international number formats

PREMIUM SUBSCRIPTION
Premium unlocks specialty finance levels (23-30) in Daily Game, all 30 levels in Practice Mode, and removes delay screens.