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In this online game, learners build complicated machines to complete simple tasks. The game starts with a power source on one side of the screen and the task on the other side.

This puzzle provides an interesting context which challenges learners to apply their knowledge of the properties of numbers.

In this number puzzle/trick, learner #1 thinks of a number between 1 and 63. Learner #2 shows learner #1 six cards and asks them whether the cards contain their number.

In this activity, learners find as many combinations of a hundred as they can using various puzzle pieces from a hundred square grid paper.