
Recent Posts
Recent Comments
Archives
Categories
Meta
Monthly Archives: January 2011
How big is the infinity?
For sure we all remember from highschool (or university if you are not Romanian đź™‚ ) that the harmonic series converges to infinity: This can be proved with Lagrange theoremÂ đź™‚ Â applied for logarithmic function. Maybe I’ll add a post … Continue reading
Posted in Math
Leave a comment
In how many different ways can you scramble the word ‘abracadabra’?
Apparently the solution isÂ Â because ‘abracadabra’ hasÂ 11 letters. But this is not correct because replacing first ‘a’ with the last ‘a’ for example would not give a different solution, and by simply using permutations we count some words more than … Continue reading