Johannes
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 310 Visually stunning math concepts which are easy to explain 15 Problems that become easier in a more general form 4 What's problematic about finding out if a large number is Prime or not? 4 Given three integers in $\{0,\ldots,100\}$ which sum up to $100$. What is the probabilty that two of them are the same? 3 Vector multiplication with scalars

### Reputation (681)

 +5 Even bi-coloring of regular graphs +40 What's problematic about finding out if a large number is Prime or not? +20 Problems that become easier in a more general form +10 Find the probability of picking red colored ball out of an urn?

### Questions (9)

 10 Stars in the universe - probability of mutual nearest neighbors 6 Sum of one, two, and three squares 5 Binomial triplets 5 Even bi-coloring of regular graphs 3 Pythagorean rectilinear polygons

### Tags (28)

 15 soft-question × 3 4 prime-factorization 15 problem-solving 4 prime-numbers 15 examples-counterexamples 4 solution-verification 9 combinatorics × 4 4 discrete-mathematics 7 probability × 4 4 elementary-number-theory

### Accounts (7)

 Physics 14,414 rep 12962 Puzzling 2,318 rep 734 Mathematics 681 rep 1415 Computational Science 146 rep 3 Astronomy 101 rep 2