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Equal temperament - musical notes and frequency
Starting from 440Hz note (musical note A above middle C), create 13 notes, using twelve-tone equal temperament, in Herz units. ...

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Babylonian method
Calculate the square root of a given positive number a using the Babylonian method (https://en.wikipedia.org/wiki/Methods_of_co...

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Speed of light:Experiment
in 1849, Fizeau set up an experiment to measure the speed of light. The discription of this experiment can be found on wikipedi...

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Carnot cycle
Carnot engine is considered the most efficient heat engine.When operated between two temperatures T1 and T2, the efficiency is g...

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Solve Quadratic : No * - or key functions permitted
Solve the quadratic equation *ax^2+bx+c=0*. However, some of the normal functions and symbols are not allowed. x=[ -b +/- sq...

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Global usage
This Challenge is to utilize Global variables. Global variables are risky as the subroutine may inadvertently and unwantingly...

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Repeat middle rows and columns of an array
Given an MxN numeric array (A), return an array (B) in which the middle rows and columns have each been repeated once. It may be...

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Parse string and identify specific string sequence in algebraic equation
Given a string S that defines an algebraic expression such as: S= 'X= A1 + A2*(Y1 + A3*Y3)*exp( A4*Y12 + Y1) ;' return a...

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How many ways to write
How many ways to write a positive integer x as the sum of n numbers , where , x>n and no n number is less than -2.

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Evaluate the Struve function
The <https://en.wikipedia.org/wiki/Struve_function Struve function> *H*_a(x) is a solution to an inhomogeneous form of Bessel's ...

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Combination of Vectors
Return a combination of vectors x1, x2 based on y1, y2 per: x(j) = 0 if y1(j) < y2(j) x(j) = x1(j) if y1(j)...

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Beat the RNG - Passwords

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What score did they give?
Your task in this problem is to figure out the most recent score, |S|, submitted. <<https://upload.wikimedia.org/wikipedia/...

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i was a mistake

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Exponents in Factorials(hard)
This is problem is a harder version of "Problem 44747. Exponents in Factorials". <https://ww2.mathworks.cn/matlabcentral/cody/p...

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pay it forward
Choose a number (integer between 0 and 65535) You will pass this problem if you are the *second* person to choose that same n...

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Find terms in the Connell sequence

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Evaluate the zeta function for real arguments > 1
The <https://en.wikipedia.org/wiki/Riemann_zeta_function Riemann zeta function> is important in number theory. In particular, th...

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Compute the harmonic numbers
The nth <https://mathworld.wolfram.com/HarmonicNumber.html harmonic number> is defined as the sum of the reciprocals of the inte...

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New Cody Time-Out Time
Determine the New Cody Time-Out Time Consume the Maximum Possible Time without Timing out. *Score:* 60 (sec) - Time (sec) ...

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Fermat's last theorem - again
For a given integer n, express it as a sum of two squares if possible. Return empty matrix otherwise. Solution may not be unique...

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attenuation
A beam of X-rays propagates a length d(1) through a medium with an attenuation coefficient alpha(1). After that the beam propaga...

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Matrix Manipulation
Given an m*n matrix, see if a matrix contains any 0s in any row. if it contains 0 anywhere in any particular row, delete that ro...

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The Deadly Sin
Melvyn and Banner are fighting over chocolates. Melvyn has X chocolates, while Banner has Y. Whoever has a lesser number of choc...

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how tall are you?
you can find the length wit this code.

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counting sequence
A counting sequence is formed by "counting" the entries in a given sequence.

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sumdigits
function [p1,p2] = goldbach(n) for p1 = 1:n if isprime(p1) p2 = n - p1; if isprime(p2) re...

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Compute circular convolution
In signal processing, we usually encounter the circular convolution case. Compute it here using the two input sequences (denoted...

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Pi Estimate 2
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation2.pdf>

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Forward Substitution
Solve a lower triangular linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/...

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