765 chairs are to be arranged in columns in such a way
that the number of chairs in each column should be
equal to the number of columns. How many chairs will
be excluded to make the arrangement possible.
Language is remarkable, except under the extreme constraints of mathematics and logic, it never can talk only about what it's supposed to talk about but is always spreading around.
Raju Sharma
Mathematics is like checkers in being suitable for the young, not too difficult, amusing, and without peril to the state.