Ivars Peterson

All Stories by Ivars Peterson

  1. Math

    Ticket to Cooperstown

    Is it getting easier to get into baseball's Hall of Fame?

  2. Math

    Paper Bags and Tricky Folds

    Folding a grocery bag flat takes a special kind of effort.

  3. Math

    Closing the Gap on Twin Primes

    A long-sought proof that there are infinitely many pairs of primes that differ by only 2 may not be far away.

  4. Math

    Name Voyager

    A striking form of data visualization enhances the search for a suitable name for a baby.

  5. Math

    Air Transport Central

    The world's air transportation network resembles the Internet.

  6. Math

    Magic Squares of Squares

    Squared integers can be put into magic patterns.

  7. Math

    Sudoku Math

    A logic puzzle craze puts the spotlight on Latin squares.

  8. Math

    Winning at Tennis

    The probability of winning a tennis set or match doesn't depend, in theory, on which player serves first.

  9. Math

    Knot an Interchange

    Highway interchanges can get you into knotty situations.

  10. Math

    Mean Median Surprise

    Calculations of means and medians lead to surprising sequences of numbers.

  11. Math

    Divisibility by Seven

    An ingenious, recently developed method tests if a number is divisible by 7.

  12. Math

    Coins in a Row

    A simple game involving coins in a row has unexpected complexities.