problem World of tan 7 - golden goose Age 7 to 11 Challenge level Can you fit the tangram pieces into the outline of the plaque design?
problem World of tan 6 - junk Age 7 to 11 Challenge level Can you fit the tangram pieces into the silhouette of the junk?
problem World of tan 5 - dragon Age 7 to 11 Challenge level Can you fit the tangram pieces into the outline of the dragon?
problem World of tan 4 - monday morning Age 7 to 11 Challenge level Can you fit the tangram pieces into the outlines of Wai Ping, Wu Ming and Chi Wing?
problem World of tan 3 - mah ling Age 7 to 11 Challenge level Can you fit the tangram pieces into the outline of Mah Ling?
problem World of tan 2 - little ming Age 7 to 11 Challenge level Can you fit the tangram pieces into the outline of Little Ming?
problem World of tan 1 - granma t Age 7 to 11 Challenge level Can you fit the tangram pieces into the outline of Granma T?
problem Folded number line Age 7 to 11 Challenge level When I fold a 0-20 number line, I end up with 'stacks' of numbers on top of each other. These challenges involve varying the length of the number line and investigating the 'stack totals'.
problem Vanishing point Age 14 to 18 Challenge level How can visual patterns be used to prove sums of series?