MindYourDecisions Courses

Seemingly Impossible Walking to College Riddle

Solve a challenging riddle about walking to college, testing your problem-solving skills and logical reasoning abilities.

• YouTube
• 12 minutes
• Self-Paced
• Free Video

The Bridge and Torch Interview Riddle - Microsoft Technical Interview Question

Master the famous bridge and torch riddle used in Microsoft interviews through step-by-step solutions and strategic approaches to this challenging logic puzzle.

• YouTube
• 14 minutes
• Self-Paced
• Free Video

Can You Solve The Marriage Logic Puzzle - 80% Get It Wrong

Discover how a deceptively simple marriage logic puzzle connects to advanced mathematical concepts about irrational numbers and rational outcomes.

• YouTube
• 12 minutes
• Self-Paced
• Free Video

Investment Bank Interview Question - 100 Noodles Probability Problem

Tackle a viral probability puzzle about connecting 100 noodles and calculating expected loops using two mathematical methods in this investment banking interview challenge.

• YouTube
• 16 minutes
• Self-Paced
• Free Video

Ramanujan's Radical Brain Teaser

Explore the legendary mathematical brain teaser that stumped mathematicians for over a year until Ramanujan himself revealed the solution to his challenging nested radical problem.

• YouTube
• 18 minutes
• Self-Paced
• Free Video

The Mystery of 355/113 and Pi

Uncover the untold history of 355/113 as an approximation for π, exploring ancient Chinese mathematicians' contributions including Liu Hui and Zu Chongzhi, and learn how this mysteriously accurate fraction was derived.

• YouTube
• 26 minutes
• Self-Paced
• Free Video

Why is Negative Times Negative a Positive? What Schools Don't Teach

Discover the mathematical reasoning behind why negative times negative equals positive, exploring patterns, scaling, velocity, and historical context from Brahmagupta's discovery to modern explanations.

• YouTube
• 13 minutes
• Self-Paced
• Free Video

Finding the Smallest Number with 426 Proper Factors - Cambridge Entrance Exam Problem

Dive into a challenging mathematical problem from Cambridge's STEP exam, exploring number theory concepts to find the smallest number with exactly 426 proper factors.

• YouTube
• 11 minutes
• Self-Paced
• Free Video

Can You Solve These Baffling Puzzles? - 7 Brain Teasers

Challenge your mind with seven baffling puzzles in this 23-minute collection, ranging from dividing squares to matchstick problems and mathematical brain teasers.

• YouTube
• 23 minutes
• Self-Paced
• Free Video

Seven Creative Mathematical Puzzles with Step-by-Step Solutions

Engage with seven mind-bending puzzles, from geometric drawing challenges to mathematical paradoxes, each offering unique solutions that will test and expand your problem-solving abilities.

• YouTube
• 13 minutes
• Self-Paced
• Free Video

7 Mind Blowing Logical Puzzles

Challenge your mind with seven intriguing logical puzzles, from Lewis Carroll's tangled tales to mathematical sequences and geometric challenges, testing your problem-solving skills.

• YouTube
• 22 minutes
• Self-Paced
• Free Video

7 Tricky Puzzles Only a Genius Could Solve

Challenge your mind with seven brain-teasing puzzles ranging from coin arrangements to chess knight problems, designed to test your logical thinking and problem-solving abilities.

• YouTube
• 21 minutes
• Self-Paced
• Free Video

Calculate Any Square Root by Hand - Actual Harvard Entrance Exam

Master the ancient square root algorithm used in Harvard and MIT entrance exams to calculate any square root by hand, digit by digit, without a calculator.

• YouTube
• 32 minutes
• Self-Paced
• Free Video

Mental Math Trick - Multiply Numbers Close to 100 in Your Head

Master a lightning-fast mental math technique for multiplying numbers near 100, complete with mathematical proof and bonus applications for instant calculations.

• YouTube
• 12 minutes
• Self-Paced
• Free Video

For Which Values of n Can You Find an Integer Solution?

Explore a mathematical problem from the 2024 Putnam Competition examining which values of n allow integer solutions, with step-by-step analysis of this intriguing number theory question.

• YouTube
• 11 minutes
• Self-Paced
• Free Video