Which times on a digital clock have a line of symmetry? Which look
the same upside-down? You might like to try this investigation and
What are the coordinates of this shape after it has been
transformed in the ways described? Compare these with the original
coordinates. What do you notice about the numbers?
A shape and space game for 2,3 or 4 players. Be the last person to be able to place a pentomino piece on the playing board. Play with card, or on the computer.
These clocks have been reflected in a mirror. What times do they say?
Click here for a poster of this problem.