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1 This picture has a flaw - 41 views
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5 Which circle is the largest - 34 views
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6 vertical lines the same length - 22 views
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8 Does the circle appear to move - 36 views
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9 Can you see diagonal grey lines - 28 views
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10 Arrow tip to arrow tip, which gap is
- 28 views
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11 Are these vertical lines the same le
- 17 views
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12 Are the diagonal lines straight - 24 views
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14 parallel-lines-illusion - 29 views
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