Search: all
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BP381 |
| Adding the top two waves yields the bottom wave vs. not so. |
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BP382 |
| No knot (unknot) vs. knot. |
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BP383 |
| When the shape is removed from the dots, the dots give enough information to place the shape back where it was vs. not so. |
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BP384 |
| Square number of dots vs. non-square number of dots. |
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COMMENTS
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All examples in this Problem are a collection of dots.
An equivalent solution is "Dots can be arranged into a square lattice whose convex hull is a square vs. not so". - Leo Crabbe, Aug 01 2020 |
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CROSSREFS
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Adjacent-numbered pages:
BP379 BP380 BP381 BP382 BP383  *  BP385 BP386 BP387 BP388 BP389
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EXAMPLE
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A single dot fits because 1 = 1*1.
A pair of dots does not fit because there is no integer x such that 2 = x*x. |
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KEYWORD
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nice, precise, allsorted, number, math, left-narrow, left-null, help, traditional, preciseworld, collection
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CONCEPT
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square_number (info | search)
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WORLD
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dots [smaller | same | bigger]
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AUTHOR
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Jago Collins
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BP385 |
| Nets of cubes vs. not nets of cubes. |
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BP386 |
| Lower shape can be used as a tile to build the upper one vs. not so. |
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CROSSREFS
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Adjacent-numbered pages:
BP381 BP382 BP383 BP384 BP385  *  BP387 BP388 BP389 BP390 BP391
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KEYWORD
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nice, precise, allsorted, left-narrow, perfect, pixelperfect, orderedpair, traditional, preciseworld, left-listable, right-listable
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CONCEPT
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tiling (info | search)
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AUTHOR
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Jago Collins
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BP387 |
| Dots can be shared equally between figures vs. dots cannot be shared equally between figures. |
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BP388 |
| White dot can see (in straight lines) all black points vs. white dot cannot see (in straight lines) all black points. |
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