r/math - Page 5

139 words A wild way to check if a number is prime using a regular expression 219 words Does every number of letters converge to four? 121 words Strange math question 377 words A (simple) problem on Game Theory 140 words What is the difference between easy and hard math problems? 159 words Probability: Helping a Game Designer Out 248 words What obscure proof did you discover but you never gonna publish because it's 'worthless'? 106 words There are no base 10, 19-digit repeating decimals for 1/n for any natural n except for 3 exceptions and 3 technicalities 130 words Career and Education Questions 200 words What are the most useful math tricks? 171 words Simple Questions 118 words Challenge: It's possible to dissect an equilateral triangle and rearrange the pieces to form a square. Can you do the same for other regular shapes? (details in comments) 149 words What's your favorite math joke that requires at least some amount of higher education in math? 118 words At each step of a limiting infinite process, put 10 balls in an urn and remove one at random. How many balls are left? 290 words What do you consider to be the most effective method to succeed in mathematics? 215 words Simple Questions 207 words Should I continue being an undergraduate TA? 640 words I made a Mandelbrot/Julia Set image generator. Here are some of the cooler pics I've rendered. 176 words Please help with first 2 equations. Placement test in 2 days!! Save my life 266 words I can answer spoonfed math questions, but I can't apply it. Is this something that gets easier or should I quit before I dedicate my life to a quantitative career?