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PUZZLE


GETTING FROM A TO B

We’re making a tower! Initially, nobody thought out the huge energy needed....

PUZZLE


SINGLE-CROSS 2

Consider 3-space (i.e. R3) partitioned into a grid of unit cubes with faces
defined...

PUZZLE


CHOCO BANANA

If we shade a subset of the cells in the above grid, we partition the

PUZZLE


HOOKS 9

The grid above can be partitioned into 9 L-shaped “hooks”. The largest is
9-by-9...

PUZZLE


GAME NIGHT!

The three best first plays from our recurring Codenames game night are
pictured...

PUZZLE


ARC-EDGE ACREAGE

In the 7-by-7 grid above, one can draw a simple1 closed curve using nothing...

PUZZLE


ROBOT LONG JUMP

Great news! The variety of robotic competition continues to grow at

PUZZLE


TWENTY FOUR SEVEN (FOUR-IN-ONE)

Four Twenty Four Seven grids have been smooshified together within the 12-by-12
grid above....

PUZZLE


LESSES MORE

Assign four nonnegative integers to the corners of a square, which we designate
the...

PUZZLE


DIE AGONY

A six-sided die, with numbers written on each of its faces, is placed on...

PUZZLE


'PENT-UP' FRUSTRATION 2

You have seventeen identical unit regular pentagonal tiles on a tabletop. If you
arrange...

PUZZLE


THE MARSHY MESS

You’ve ventured warily into Puzzle Forest, and as you round a bend you see...

PUZZLE


PAIR DANCE 2

disgust (3,1,1) mollifies (4,1,3,2) calling in (3,1,3,4,2)

PUZZLE


NEW YORK MINUTE

The Jane Street Puzzle Master has twenty-three errands (don’t worry, almost all
of them...

PUZZLE


ANDY'S MORNING STROLL

Andy the ant has spent most of his days living on a strange land...

PUZZLE


BLOCK PARTY 4

Fill each region with the numbers 1 through N, where N is the number...

PUZZLE


ROBOT UPDATED SWIMMING TRIALS

Back in October, we were tasked with the puzzle of finding the smallest
number...

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Regulated activities are undertaken in Europe by Jane Street Financial Limited,
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regulated entity under the Hong Kong Securities and Futures Commission (CE No.
BAL548). Each of these entities is a wholly owned subsidiary of Jane Street
Group, LLC. This material is provided for informational purposes only and does
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registered trademarks of Jane Street.