- The IntegerZone presents the set of integers
as a resizeable and scrollable rectangular grid, and presents a menu of different
interaction modes, each one demonstrating or testing different aspects of arithmetic
and number theory.
- TenBlocks presents the multiplication table
as a series of simple puzzles. Each multiplication problem is presented as a
grid of squares of the corresponding height and width, and the user is required to fill
it in with blocks of ten squares, until there are less than ten
squares left unfilled. Two "ten blocks" shapes are available: a 2 times 5 rectangle, and
a 3 times 3 rectangle with an extra square attached to one of the corner squares.
The hardest multiplication problem to solve seems to be 9 times 9, because you can only have
one square left over when you are finished.
Copyright © Philip Dorrell 1999-2007