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Easy Sequences 16: Volume of Embedded Octahedron
An octahedron (not regular) is formed by joining the centers of the faces of a rectangular parallelepiped (see below figure). ...

3 years ago

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Spherical surface triangulation
Create a triangulation of a spherical surface with approximately-uniform coverage http://www.alfnie.com/software/print_sphere...

3 years ago

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LASER Tracker - Mirror Distance and Angle
Determine the mirror's distance and relative angle to the LASER Tracker given the distances to a reference SMR (Spherical Mounte...

3 years ago

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rectangle in circle
In the figure below, the rectangle at the corner measures a cm x b cm. What is the radius of the circle in cm? <<http://www....

3 years ago

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BLOCK x3 (Version 1)
<https://play.google.com/store/apps/details?id=com.noodlecake.blockblock BLOCK x3> is a simple, fun and relaxing puzzle game. ...

3 years ago

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Hangman (strategy)
What is the best strategy in a <http://en.wikipedia.org/wiki/Hangman_(game) hangman> game? Your job is to device a strategy t...

3 years ago

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Cipher and Decipher the message - 3 key

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Decipher the message - same key for all digits
You will be given a input number (eg) x='gdkkn' you have to figure out the dechiper key and match it with given input and deci...

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Cipher or decipher the number according to the second input - 10 keys

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Cipher or Decipher the number according to the second input - 3 keys - order [1 2 3 2 1 2 3 ......]

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Cipher or Decipher the number according to the second input - 3 keys

3 years ago

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Cipher or Decipher the number according to the second input - 1 key for all digits

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Decipher the number 4 - 3 keys - order [1 2 3 2 1 2 3 ......]

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Decipher the number 3 - 10 keys

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Decipher the number 2 - 3 keys

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decipher the number 1 - same key for all digits :)
You will be given a input number (eg) x=12345 you have to figure out the dechiper key and match it with given input and deciph...

3 years ago

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Multiply pi
Multiply pi with x!

3 years ago

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MPS to MPH
Given the speed in miles per second, find the speed in miles per hour.

3 years ago

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Degrees to Radian
Convert degrees to radians

3 years ago

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Print true if
all elements are larger than 5 a=[1 3 5 8 6]; b=[6 6 6 6 6]; function(a) should be false, and function(b) will be tru...

3 years ago

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String Logic 10
Examples: 'SUNDAY' --> 83 'MONDAY' --> 77 'TUESDAY' --> 84 'WEDNESDAY' --> 87 'THURSDAY' --> 84 'FRIDAY' --> 70 'SATURD...

3 years ago

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Place wastewater treatment processes in the correct order
There are many technologies for treating wastewater. For example, grit chambers are used to remove heavy solids, filtration is u...

3 years ago

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List the households affected by leaks in water distribution
Consider the following water distribution network, where water is pumped uni-directionally from left to right: 8...

3 years ago

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Maximize the production in a plant within equipment capacity
The goal of a certain manufacturing company is to maximize its production of goods per day. In the production flow, there is a s...

3 years ago

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Trace the path of a harmful chemical in an ecological network
An ecological network consists of the cycles of nature, such as the water cycle, the carbon cycle, the oxygen cycle, etc. Due to...

3 years ago

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Count the number of reaction chains achievable in T mins
This problem is related to Problem <45467>. Let's denote a list of *N* compounds as 1, 2, ..., *N*. You are then given a list...

3 years ago

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Find the fastest reaction chain to reach a target compound
This problem is related to Problem <45470>. Let's denote a list of *N* compounds as 1, 2, ..., *N*. You are then given a list...

3 years ago

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Propagate the effects of a blockage in a chemical plant
From the perspective of flow, a chemical plant can be described by a collection of _nodes_ and _edges_. _Nodes_ are points where...

3 years ago

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Design a minimum-cost cable network for a power grid
You are given the 2-D point locations ( _xi_ , _yi_ ) of *N* _components_ of a power grid. These _components_ include power sour...

3 years ago

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Pitting corrosion on a metal plate: Find the largest pit
You are given an N x M matrix of _ones_ and _zeros_, which represents an image of a rectangular metal plate taken from the hull ...

3 years ago