01/05: Try drawing this....

Try to draw this...

A draw-it-yourself impossible object...

Click on 'Reade More' for hints.

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01/05: Which line is longer?

Which is longer... AB or BC?

Which line is longer...AB or BC?

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01/05: Checker Shadow Illusion

Checker Shadow

Are the squares marked A and B the same shade of gray?

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