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BP818 |
| Dot's position within square is center of square's position within panel vs. not so. |
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BP820 |
| Shape can be combined with a copy of itself to form a convex shape vs. not so. |
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BP821 |
| Impossible Bongard Problems vs. possible Bongard Problems. |
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BP822 |
| Two drawn polyhedra are duals vs. not so. |
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BP823 |
| Conic section (plot of solution to conic equation) vs. not so. |
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BP824 |
| Objects shown chosen from collection in an ordered, algorithmic way vs. random choices involved. |
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BP825 |
| Ticks mark an infinite sequence of angles on circle such that each angle is the double of the subsequent angle in the sequence (angle measured from rightmost indicated point) vs. not so. |
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COMMENTS
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This is solvable; it was solved by Sridhar Ramesh.
A full turn is considered "the same angle" as no turns; likewise for adding and subtracting full turns from any angle. All sequences of angles shown start at the rightmost tick.
It doesn't matter whether the angle is measured clockwise or counterclockwise, as long as the choice is consistent. |
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CROSSREFS
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Adjacent-numbered pages:
BP820 BP821 BP822 BP823 BP824  *  BP826 BP827 BP828 BP829 BP830
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KEYWORD
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hard, convoluted, notso, math, solved
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CONCEPT
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sequence (info | search)
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AUTHOR
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Aaron David Fairbanks
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BP826 |
| Hard Bongard Problems a person has been seen to solve without cheating vs. hard Bongard Problems no one is known to have solved yet without cheating. |
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