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**Content Feed**

Solved

Side of an equilateral triangle

If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

4 years ago

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Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

4 years ago

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Is this triangle right-angled?

Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

4 years ago

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Circle area using pi

Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.

6 years ago

Solved

Simple equation: Annual salary

Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

8 years ago

Solved

Solving a quadratic equation

Given a, b and c, Return the solution of the following quadratic equation: a*x^2 + b*x + c = 0.

9 years ago

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Number of Horns on a unicorn!

Calculate the number of horns on a *unicorn*! And I'm talking about a unicorn with not more than one horn on it!

9 years ago

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Wind outward from the center ...

Create an n-by-n matrix with elements ranging from 1 to n^2 in a rectangular spiral pattern. Example if n = 5 : 21 ...

9 years ago

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Remove white space from the string

Remove the white spaces (trailing and leading) from the input variable

9 years ago

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Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4

Example: in = magic(5) in = 17 24 1 8 15 23 5 7 14 16 4 6 13 20 ...

9 years ago

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Matrix with different incremental runs

Given a vector of positive integers a (>=0); How does one create the matrix where the ith column contains the vector 1:a(i) poss...

9 years ago

Solved

N-Cards Problem

You have a deck of _N_ cards numbered in order from 1 to _N_. You discard the top card (card 1) and place the next card (card 2)...

9 years ago

Solved

Cody Computer Part 2 - Get the license number of Cody Computer

In the Cody computer investigation party, you may have already solved : <http://www.mathworks.com/matlabcentral/cody/problems...

9 years ago

Solved

Cubic Integer Constrained Solution

Find an integral non-trivial solution (x,y,z ~=0) (x=0 or y=0 or z=0 are trivial) for the cubic equation 987,654,321x + 12...

9 years ago

Solved

Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

9 years ago

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How many monitors are connected ?

How to obtain the numbers of monitors connected to your computer ?

9 years ago

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The Birthday Phenomenon

First off, leap years are not being considered for this. In fact the year that people are born shouldn't be taken into considera...

9 years ago

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Find the two-word state names

Given a list of states, remove all the states that have two-word names. If s1 = 'Alabama Montana North Carolina Vermont N...

9 years ago

Solved

System of equations

Find a solution to a system of equations represented by a |n| by |n+1| matrix. For instance, [ 2 0 4; => 2*x = 4 ...

9 years ago

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Find the "ordinary" or Euclidean distance between A and Z

A, B and Z define three points in the 3D _Euclidean_ space of the form: A = [x1;y1;0]; B = [x2;y2;0]; Z = [x2;y2;z]; Find th...

9 years ago

Solved

Circumscribed circles

Given the lengths of the 3 sides of a triangle, output the radius of the circumscribed circle. Example: [3 4 5] -> 2.5

9 years ago

Solved

root?

* Given a function 'foo', and a position 'there', find the root near 'there'. * For example: If foo=@sin, and there=3.1, then r...

9 years ago

Solved

Duplicate each element of a vector.

for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

9 years ago

Solved

Filter values in a vector

Cody often benefits from a functional style of programming. For example, your score is often better when you compose multiple fu...

9 years ago

Solved

Specific Element Count

Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...

9 years ago

Solved

More luck than brains

Give a random function that guess and return numbers from 1 to 6 exactly like the test suite .

9 years ago

Solved

Vectorize the digits of an Integer

Create a vector of length N for an integer of N digits. x=123045; x_vec=[1 2 3 0 4 5]; I happened upon a trick to do ...

9 years ago

Solved

Replace May with April

For instance, if the input is input_str = 'The flowers may bloom in April'; then the output is output_str = 'The flo...

9 years ago

Solved

Find the two most distant points

Given a collection of points, return the indices of the rows that contain the two points most distant from one another. The inpu...

9 years ago