Solved


Additive persistence
Inspired by Problem 2008 created by Ziko. In mathematics, the persistence of a number is the *number of times* one must apply...

7 years ago

Solved


Ripping numbers apart!
So you have to "rip" a number apart into individual digits... The end output is a cell. That is if: x = 12345678 o...

7 years ago

Solved


What is the next step in Conway's Life?
Given a matrix A that represents the state of <http://en.wikipedia.org/wiki/Conway's_Game_of_Life Conway's game of Life> at one ...

7 years ago

Solved


Inscribed Pentagon?
Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

7 years ago

Solved


Is this is a Tic Tac Toe X Win?
For the game of <https://en.wikipedia.org/wiki/Tic-tac-toe Tic Tac Toe> we will be storing the state of the game in a matrix M. ...

7 years ago

Solved


Missing five
Convert decimal numbers to a base-9 notation missing the digit *5* <<http://www.alfnie.com/software/missing5.jpg>> Too man...

7 years ago

Solved


Find the nearest prime number
Happy 5th birthday, Cody! Since 5 is a prime number, let's have some fun looking for other prime numbers. Given a positive in...

7 years ago

Solved


Extra safe primes
Did you know that the number 5 is the first safe prime? A safe prime is a prime number that can be expressed as 2p+1, where p is...

7 years ago

Solved


Find matching string from a list of strings
Write a function that returns a string that is a unique match (if it exists) of the string |inStr| from a list of strings |strLi...

7 years ago

Solved


Transposition as a CIPHER
This all about transcripting a text message. If the input string is: *s1 = 'My name is Sourav Mondal'*, then the output is: *s2...

7 years ago

Solved


Formatting currency numbers
Given a number, format it properly for textual display using the notation $xxx,xxx,xxx.xx. Assume that no more than two digits ...

7 years ago

Solved


Find matching parenthesis
One of the most indispensable things about a great text editor for programming is the ability to quickly jump between matching p...

7 years ago

Solved


QWERTY Shift Code Decoder
Decode a string encoded using the QWERTY shift code. QWERTY shift code is where the message was touch typed but with an offse...

7 years ago

Solved


QWERTY Shift Encoder
Encode a string using the QWERTY shift code. This code is where you touch type but are offset by one character to the right. ...

7 years ago

Solved


Power Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on times that represent powers. Fo...

7 years ago

Solved


Find the distance between runs
Another question inspired by the <http://uk.mathworks.com/matlabcentral/answers/?s_tid=gn_mlc_an answers forum>: A vector of ...

7 years ago

Solved


Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

7 years ago

Solved


Fermat's Last Theorem - Fermat's conjecture
Fermat's Last Theorem (sometimes called Fermat's conjecture, especially in older texts) states that no three positive integers a...

7 years ago

Solved


Project Euler: Problem 3, Largest prime factor
The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number being input, input might be ui...

7 years ago

Solved


Champernowne Constant
The <http://en.wikipedia.org/wiki/Champernowne_constant Champernowne constant> is a real number whose digits in decimal represen...

7 years ago

Solved


P-smooth numbers
This Challenge is to find <https://en.wikipedia.org/wiki/Smooth_number P-smooth number> partial sets given P and a max series va...

7 years ago

Solved


Determine if input is a Narcissistic number
<http://en.wikipedia.org/wiki/Narcissistic_number Narcissistic number> is a number that is the sum of its own digits each raised...

7 years ago

Solved


Numbers with prime factors 2, 3 and 5.
Make a function which takes one positive integer n and returns a matrix with the numbers of the form (2^i)*(3^j)*(5^k) which are...

7 years ago

Solved


Convert a structure into a string
Convert the contents of each fields into a string. Example with an input structure s with 2 fields : s.age = '33' s....

7 years ago

Solved


Bit calculation
Give me the count of numbers from 1 to n having their last two bits as 0. For example function y = ret_count(4) y = x...

7 years ago

Solved


Mysterious digits operation (easy)
What is this digit operation? 0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...

7 years ago

Solved


Mongean Shuffle
A Mongean shuffle of an n card deck starts with putting the initial deck on the left hand side. * The top card of the deck is...

7 years ago

Solved


Construct a "diagAdiag" matrix
Construct a matrix whose elements begin from 1 and end at n^2 with the order of arrangement as shown below: For: n = 4 ...

7 years ago

Solved


compress sequence into intervals
You're given a row vector of monotonically increasing integers most of which are consecutive. Find the upper and lower bounds of...

7 years ago

Solved


How many digits are there?
Input(s) - any string Output(n) - number of digits within string s

7 years ago

Load more