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Largest Twin Primes
<http://en.wikipedia.org/wiki/Twin_prime Twin primes> are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Giv...

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Perfect Square or not
find Given input x is perfect square or not,if yes then output y=1.else y=0

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Given a matrix, return the last eigen value
Given a matrix, return the first eigen value For example: x = magic(5) 17 24 1 8 15 23 5 7 14 ...

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Matlab Basics - y as a function of x
write a script to calculate y as a function of x, such that y = 6x^2 + 5x - 2

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Sum of the Matrix Elements
Add up all the elements in a NxM matrix where N signifies the number of the rows and M signifies the number of the columns. E...

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Sum of first n terms of a harmonic progression
Given inputs a, d and n, return the sum of the first n terms of the harmonic progression a, a/(1+d), a/(1+2d), a/(1+3d),....

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7 segment LED display
Given a whole number, output how many segments would be lit up to display it on a 7 segment LED display (http://en.wikipedia.org...

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Sophie Germain prime
In number theory, a prime number p is a *Sophie Germain prime* if 2p + 1 is also prime. For example, 23 is a Sophie Germain prim...

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Test if a Number is a Palindrome without using any String Operations
*Description* Given an integer _X_, determine if it is a palindrome number. That is, _X_ is equal to the _X_ with the digits ...

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Derivative of polynomial
Compute the derivative of a given polynomial. The input is an <http://www.mathworks.com/help/matlab/math/representing-polynomial...

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Matlab Basics - Create a row vector
Write a Matlab script to create a row vector of 10 consecutive numbers x = [1 2 3 4 5 6 7 8 9 10]

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Swap two numbers
Example Input: a = 10 b = 20 Output a = 20 b = 10

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Create incrementing array
Given a and b generate an output matrix as shown in following examples: a=2 b=5 output=[2 20 200 2000 20000] a=4 b...

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letter yes yes & letter no no
Split a string into two strings, first string has all alphabetic letters, next string has all the rest, keep the order please, o...

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Remove the two elements next to NaN value
The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

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Better bullseye matrix
<http://www.mathworks.com/matlabcentral/cody/problems/18-bullseye-matrix Problem 18> asks to create a bullseye matrix like this:...

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random picture with random colours
write a function which creates a random(x,y) matrix with random RGB colours for example create_pic(5,5) gives us a 3d matrix. ...

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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...

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Solve the set of simultaneous linear equations
Given this pair of simultaneous linear equations: 2x + 3y = 23 3x + 4y = 32 Find the solution set (x,y)

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Fill a zeros matrix
The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...

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Volume of this donut
Given hole diameter a, and outermost diameter b, determine the volume y of the resulting donut.

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Back to basics 24 - Symbolic variables
Covering some basic topics I haven't seen elsewhere on Cody. Given a string algebraic expression, return the symbolic variabl...

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Construct a string from letters and counts
Given two input arrays like this: [5,3,1] ['a','b','c'] Output a string that contains each letter the specified num...

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Wrapping the Tower of Pisa
The famous artist Christo Vladimirov Javacheff, who likes pizza, wants to wrap the well-known Italian tower in paper. It is a ci...

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Small Riddle
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?

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Box!
Given a box, find the volume of the cube. With each side = a.

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Create an anti-identity matrix
Create an anti-identity matrix of given dimension. Examples n = 2 A = [0 1; 1 0] n = 3 A = [0 0 1; 0 1 0; 1 0 0...

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Largest Prime Number
Given a matrix X, find the largest prime number in X.

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intersection of matrices
Given two matrices filled with ones and zeros, determine if they share a common row, column entry. These matrices are of identi...

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Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. <http://en.wikipedia.org/wiki/Whole...

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