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Speed of car travelling x meters in y seconds
What is the speed of a car if the car travelled x meters in y seconds? Supply the answer in m/s.

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factorial_calc(n)
Write a MATLAB function called factorial_calc(n) that takes a positive integer n as input and calculates the factorial of n. The...

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Alkane
Given a number, x, that is equal to the number of carbon atoms in an <http://en.wikipedia.org/wiki/Alkane alkane>, find, y, the ...

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Variable_Addition
be able to add any variable to the number one

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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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Min by mean
Substitute the minimum value in each row of a matrix A by the mean of that row (it should also work if the input is a vector)

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Remove white spaces at the end of the input string
Remove all trailing white spaces at the end of the input strings

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Basics: counting digits of a number irrespective of the sign
publish the number of digits in any input integer example: -23---->2

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Calculate triangle area
Imagine that you want to calculate the areas of some triangles given in matrix form. First the coordinates of the vertices of th...

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Where is she?
Given the numbers 12, 3, 6, 9 Tell where the girl is located. That is: Look to your 3 o'clock = look right Example ...

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Surface area of a sphere
Given the radius of a sphere, find it's Surface area

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Find parts of a circle.
Given radius (r) of a circle find the diameter (d), circumference (c), an area (a).

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Detect pair of equal values in a Matrix
A 2D matrix of 2 rows and N columns with random integer numbers. A = [3 1 2 4 6 6 7; 7 3 2 1 5 2 4] ...

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Magnitude with vargin
Return the magnitude (square root of the sum of the squares) for an undefined number of input arguments.

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Squares in Squares - Concentric Squares
Given a number, n, create an n x n sized matrix with concentric squares of 1s from the outside in. There should be a gap between...

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Square Patterns in a square matrix

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Spiral Out - 01
Create a spiral matrix ( clock-wise direction ) of size n. Try to do that without using the built-in function.

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Sub-sequence - 01
Find the length of the longest increasing subsequence in the given array. a=[2,4,2,1,3,5,6] longest increasing subsequen...

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Five Fingers
A little girl has just learnt how to count from 1 to N using the five fingers of her left hand as follows. She starts by calling...

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Remove the air bubbles from a vector
_*A reduced version of Problem 112*_ Given a column vector v, return a vector w in which all the zeros have "bubbled" to the ...

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Given a matrix A (size m x n) create a matrix B (size m+2 x n+2) which consists of matrix A surrounded by zeros. See Example below:
A = [1 2 3 4 5 6] ----------- B = [0 0 0 0 0 0 1 2 3 0 0 4 5 6 0 0 0 0 0 0]

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Given a Vector v1, create v2 which is the sum of each two adjacent elements in v1. {length(v2)=length(v1)-1}
if v1 is [1 2 3 4 5 6 7 8] then v2 should be [3 5 7 9 11 13 15]. if v1 is [1; 3; 5; 7] the...

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Given a matrix A (size m x n) create a matrix B which consists of matrix A sorted in descending order by columns and then by rows.
--------------- A= [ 2 6 -3 7 12 0 -12 5 1] --------------- B= [12 7 1 6 2 0 5 -3 ...

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Given a matrix A return a vector of the product of the elements in each column using a loop without using prod.
--------------------- for m: 3 1 3 3 10 1 9 1 9 4 1 4 5 6 5 ...

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Horizontal matrix sort
Given a matrix x with n rows and m columns, return a matrix y with n rows and 2m columns, such that every row in x is sorted fro...

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Separate even from odd numbers in a vector - with a loop
*Using a loop*, rearrange a vector of integers such that the odd numbers appear at the beginning, and even numbers at the end. T...

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Average of even-numbered columns
Given a vector, find the average of even-numbered columns. e.g x　=　[ 4 6 8 9 1 2 7 ] y =　( 6 + 9 + 2 ) / 3

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determine the sum of decimal part for given matrix
determine the sum of fraction part for the given matrix

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"Power matrix" of two vectors
Given two row vectors x,y of lengths m and n (respectively), create an m x n matrix whose i,j entry is x(i)^y(j).

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Divisible by n, prime divisors from 20 to 200
Pursuant to the previous problem (linked below), this problem requires a function that checks for divisibility of large numbers ...

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