Rolazaro Azeveires

 13 Computing $999,999\cdot 222,222 + 333,333\cdot 333,334$ by hand. 7 Why can't you square both sides of an equation? 7 Interesting math-facts that are visually attractive 5 Easier way to divide a fraction by a fraction. 5 How can I get sequence $4,4,2,4,4,2,4,4,2\ldots$ into equation?

### Reputation (629)

 +2 If, given a set of nonzero values, the ratio between the min and max is at least $\frac{1}{2}$, is this true for all other values inside the set? +25 Let A and B be sets. Prove A=B implies B=A. +10 Determine tournament brackets with only the match results +10 Why can't you square both sides of an equation?

### Questions (0)

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### Tags (21)

 19 arithmetic × 3 5 sequences-and-series 13 contest-math 2 probability-theory 11 probability × 7 2 analysis 7 algebra-precalculus 2 stochastic-processes 5 fractions 1 elementary-set-theory

### Bookmarks (20)

 22 Two individuals are walking around a cylindrical tower. What is the probability that they can see each other? 9 How Strong is an Egg? 5 How to divide currency? 5 Number of combinations such that each pair of combinations has at most x elements in common? 5 Finding the number of real roots of an unusual(!) equation [closed]