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Can You Crack the Roman Code?
The code for a vault happens to be written in Roman numerals, which is no problem. But there are no spaces between digits, which is indeed a problem…
Jun 27
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Zach Wissner-Gross
4
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Can You Crack the Roman Code?
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How Greedily Can You Mow the Lawn?
You’re trying to mow a circular patch of lawn with straight passes of your lawnmower. If you mow as much of the remaining grass as possible with each…
Jun 20
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Zach Wissner-Gross
3
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How Greedily Can You Mow the Lawn?
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20
Can You Race Against Zeno?
You run half a race, then speed up a little. You run half of the remainder, then speed up a little more. If you keep doing this, how fast will you run…
Jun 13
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Zach Wissner-Gross
5
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Can You Race Against Zeno?
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20
Can You Squeeze the Bubbles?
You draw seven circles, one at a time. Each new circle’s center can’t be inside any of the previously drawn circles. How small can their combined area…
Jun 6
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Zach Wissner-Gross
6
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Can You Squeeze the Bubbles?
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36
Can You Weave the Web?
A spider randomly picks two points within a square, connects them with silk, and extends the connection to the square's edges. Which points are most…
May 30
•
Zach Wissner-Gross
1
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Can You Weave the Web?
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8
How Long Is the River?
Sometimes, everything just lines up. Even the spaces on a massive page of text.
May 23
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Zach Wissner-Gross
1
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How Long Is the River?
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21
Can You Permeate the Pyramid?
How many paths can you find down a pyramid? (Okay, it’s really a rhombus.) What about a bipyramid? (Yes, it’s really a bipyramid.)
May 16
•
Zach Wissner-Gross
1
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Can You Permeate the Pyramid?
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Can You Sweep the Series?
A famous sports personality recently commented that winning a best-of-seven series in five games is closer to a sweep than going to seven games. But…
May 9
•
Zach Wissner-Gross
1
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Can You Sweep the Series?
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9
How Many Rides Can You Reserve?
After booking three rides at a theme park, you can reserve one additional ride after each one you complete. On average, how many rides will you complete…
May 2
•
Zach Wissner-Gross
9
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How Many Rides Can You Reserve?
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20
Can You See Between the Trees?
You are peering between trees positioned on an infinite grid. Where are the largest gaps between them that you can see?
Apr 25
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Zach Wissner-Gross
4
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Can You See Between the Trees?
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