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Periodic Table 101.
Given the atomic number (z), answer the symbol for that particular element of the <http://en.wikipedia.org/wiki/Periodic_table/ ...

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Schwarzschild radius
Compute the Schwarzschild radius for objects of mass m (kg). Use c = 299,792.458 km/s and G = 6.6738*10^-11 N*(m/kg)^2. Your fun...

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Maximum of ND-array
Find the maximum element of a N dimensional array. Example: A=[1 2 4 ; -20 4 10]; The maximum is 10.

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basic finance application
i watch bloomberg everyday and i want to estimate a stock price stability, so i have to calculate the momentum & the rate of cha...

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continuous compounding
what's the present value of having 100 dollars after n years given a continuously compounded rate i ? keep only 2 decimals pleas...

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find the logic,easy one
find the logic behind, example x=18 y=306 x=53 y=2756

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Problem 44444 !!! free beer everyone
just say hallelujah to solve this problem

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World Cup 2018 Prediction!
Which team will be the winner?

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Create Circular Perfect Square Sequence
A sequence v(1:N) made of values 1:N can be created for N>31 such that v(i)+v(i+1) is a perfect square. The sum of v(N)+v(1) mus...

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Breaking up a chocolate bar
You've got a chocolate bar of size , and you want to break it up into bite-sized () pieces. How many steps are required to do th...

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My wife's logic
Its is always the opposite of the causality law, that is to say the implication relationship in math/logic terms : Figure...

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List the segmented numbers
The sequence of segmented numbers begins 1, 2, 4, 5, 8, 10, 14, 15, 16. Notice that none of the terms is the sum of consecutive ...

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Amazing circle of numbers 1 to n
For given natural number n, create amazing circle of numbers 1 to n without a repeat. This circle is that the sum of any two ad...

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center of mass
R is a given matrix with size [n,2]. R(i,:) is interpreted as the 2D-position of a mass point with mass i. Calculate the center ...

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Kinetic Energy
Given mass, m, and kinetic energy, KE, find the velocity of the object.

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Prime numbers which are the difference of two consecutive cubes
Problem statement Given a positive integer n greater than 2, find the prime numbers less or equal to n and which are the diff...

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Frequencies of prime gaps
Problem statement Given two positive integers n and , write a function which computes the frequency of the gap between two ...

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Check the 'golden prime squares' equation
Historical context In december 2023, I / Nicolas Douillet was working on prime squares properties and I found* the formula : ...

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Convert hex color specification to MATLAB RGB
Here's something that comes up all the time if you deal with web pages. Given a <http://www.w3schools.com/html/html_colors.as...

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Find number of days
The input is two date in string format (dd-mm-yyyy) find out the number of days between these two dates. Example: input: ...

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Repeat the entries of the vector to their reference times in the vector.
e.g for input x: [ 7 3 9 5] output y: [ 7 3 3 9 9 9 5 5 5 5]

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Negation the hard way
Write a function that has the following property: f(f(x)) = -x for any numeric array x. Note that there is no restriction on ...

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Faint Receipt
Suppose you have a receipt with some numbers that have been smudged or didn't print. In particular, the total amount is missing ...

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Convert a vector to a lower triangular matrix
I now have a row vector and I want to convert it to a lower trilangular matrix. The rows of the lower trilangular matrix have t...

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Find the index of elements in a string vector
In the vector of v, find the index of elements specified by a. v = ["Lion","Koara","Elephant","Snake","Dog","Cat","Camel"]; ...

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Reverse within string
If input is a string 'yellow' the output should be 'leywol'. Locate the middle of the string and reverse the first (yel) and sec...

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what's my tax amount this year ?
given an annual salary x and a tax rate i calculate the amount that you have to pay.Example x = 70000; i=.10 y_correc...

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Simple Income Tax

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Sales Tax

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Find the starting index of a consecutive condition
Given a logical vector |v|, and a positive integer |n|, return the smallest index |i| that satisfies: all( v(i : i+n-1) ) =...

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