B Pattern inductive reasoning problem

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In attempting to finish the sequence, I realized that the triangles in the inner hexagon is decolored in the direction of the arrow I drew for the given elements of the sequence. Any tips on how to think systematically about similar problems since I am required in the exam to complete like problems within a minute and half.
 

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It's pure pattern recognition. It's supposed to be in the category of IQ test, but its definitely learnable because step one is to go through a list of possible patterns and checking for each one.
If you want to see more of this pattern, look at all of the white triangles and which colors appear in which squares.
What's this test for?
 

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