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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 online game, learners run an outer space drink stand and thirsty alien customers are on the way.

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 online puzzle game, learners need to choose a path from a starting number to a goal number. Along the path are simple operations (e.g.

Can you read the sentence "I C U"? Not really - but if you say each letter aloud, you'll say the simple sentence, "I see you." What if you change the "C" into a picture of an eye?

In this math activity, learners create a magic turtle where all the rows, columns and diagonals add up to fifteen.