Lichen Puzzles – multiplication and subtraction

Lichen Puzzles – multiplication and subtraction

Lichen Puzzles (MathPickle, 2013) These are difficult puzzles – not the puzzle you want to start exploring multiplication, but there are rich ideas here that are worthy of exploration.  I now call these puzzles Lichen Puzzles… Download printable Lichen...
Donald Knuth

Donald Knuth

Stanford prof of computer science.  Stanford prof of computer science.  Stanford prof of computer science.  Stanford profT of computer science.  Stanford prof of computer science.  Stanford prof of computer science.  Stanford prof of computer science.  Stanford prof...
Paul Erdős (1913-1996)

Paul Erdős (1913-1996)

This is the most published mathematician in history.  This is the most published mathematician in history.  This is the most published mathematician in history.  This is the most published mathematician in history.  This is the most published mathematician in history....
Issai Schur

Issai Schur

Issai Schur1875 – 1941 Issai Schur was a quiet, naive mathematician who had very little time for religion or politics. He could never understand the Nazi preoccupation with his Jewish heritage. In his mind, he was a German – not a Jew. Ousted from his respected...