There are five types of games / tests in this game. When you practice, you can play through them all, at all 3 difficulty levels. When you take the "test", it randomly chooses a game from each test type to foist on you.

The five types are:

Think
These are tests involving logical thought. You have to figure out paths, determine logically which item is heavier, and figure out directions.

Identify
These involve visual matching. You figure out which shadow goes with which shape, build shapes out of components, and have the traditional memory game.

Compute
Number based games, like coin comparisons, adding up numbers and ... adding up numbers :)

Memorize
No word lists here! You're playing a game of Simon as well as memorizing numbers and images.

Analyze
These are spatial types of games. You connect the dots, count up three dimensional cubes and connect lines of shapes.

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