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| In fact, there are only 3 green, white and the pink / mauve --- the red and dark green are mere illusions |
| How many colour can you see in the grid? |
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| Do you see a cube in a cube or a cube with a piece missing? |
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| Do you see a face or the word "liar" ? |
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| Do you see just a few black blotches or the word "Lift" |
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| You can see the old man's face, but can you see the two young lovers? |
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| Hard to believe, but all the lines are straight! |
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| If you check the grid, you will find that the slope of the second triangle is steeper, creating a slightly larger area -- and the hole! |