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In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners.

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

In this Cyberchase activity, learners use the numbers one through six to solve a puzzle.

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 use a fictitious map of "Tourist Town" and counters to problem solve how to place ice-cream vans on street intersections so that every other intersection is connected to one