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18 votes
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Tiling a 16x16 square with 1x4 rectangles

Below a solution in which every gridline splits at least one 1x4 rectangle into 2 regions: Edit Actually, I found an easy pattern that will work on bigger squares as well: white: expandible corner ...
Lezzup's user avatar
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9 votes
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origami SNY t28

Here it is. You can also fold it to a square:
Florian F's user avatar
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8 votes

Try Triling ("Triangular-Tiling")

Solution to the Practise problem: And how to get there:
fljx's user avatar
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8 votes

Try Triling ("Triangular-Tiling")

Solution for the Practise Problem I started
Prim3numbah's user avatar
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7 votes
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Try Triling ("Triangular-Tiling")

Here is the solved ‘hard problem’: Which then forces this
PDT's user avatar
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7 votes
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origami J-SHAPED t2

Center edges of 3 squares diagonal folds:
z100's user avatar
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4 votes

Tiling a 16x16 square with 1x4 rectangles

Unless I've misunderstood the requirements, the following is optimal:
fljx's user avatar
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4 votes

ORIGAMI PUZZLES completed version

Here are my partial answers. With some differences from PDT's. Fold on the blue lines. Row 1, #1 to #5 Row 2, #6 to #10 Row 3, #11 to #15 Row 4, #16 to #20 Row 5, #21 to #25 PS: I removed a ...
Florian F's user avatar
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4 votes
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Two digits in one

It's also: Indeed, I have no specific way of knowing if this is in fact the intended answer but it fits with the geometry tag and, quite literally, lateral thinking. If it's not, well there is only ...
Fluorine's user avatar
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3 votes
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ORIGAMI: Above and beyond

Found this when originally solving the first few example puzzles.
Magma's user avatar
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3 votes

Geometry Puzzle: Tangent Circles with Integer Radii

edwardh's answer above gives eight circles with radii circa $10^{42}$: ...
Quuxplusone's user avatar
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3 votes

ORIGAMI PUZZLES completed version

For the top half this is my progress so far: Row 1 (complete) Row 2: Last is still unsolved and also added steps for 1 and 4 for clarity: Row 3 (complete)
PDT's user avatar
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2 votes

Tiling a 16x16 square with 1x4 rectangles

Via integer linear programming, the maximum is... ...
RobPratt's user avatar
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2 votes

ORIGAMI PUZZLES completed version

My (still incomplete) set of solution. I assume the 'simultaneous folds' at 10 and 30 are allowed?! (note: blue folds before green) Nr 10 more detailed:
Retudin's user avatar
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1 vote

Two digits in one

It's also the digit...
dhuang's user avatar
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1 vote

origami J-SHAPED t2

logic: for anyone attempting my original puzzle pack (linked in the question), the spoilered logic is helpful for a lot of puzzles.
Omega_3301's user avatar
1 vote

Geometry Puzzle: Tangent Circles with Integer Radii

The closest I've got so far with some very brute force searching is this sequence of radii: 20, 19, 18, 17, 16, 14, 8, 5, 4, 3, 2. The final circle overlaps with the rightmost one by about 5....
Brandan's user avatar
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1 vote

Tile a square with five rectangles with 10 distinct edges

This computer program produces the same answer as the one above. It is written in tinyC, a C-like language. tile.html
Lee Bradley's user avatar

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