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...

11 months ago

Solved


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

11 months ago

Solved


De-primed
Write a function that will multiply every prime number in the array or matrix by two, leaving all other numbers the same, and re...

11 months ago

Solved


Evened up (or not)
You will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0...

11 months ago

Solved


Sum the Digits of a Number
Given an integer, sum the digits repeatedly until you end up with a single value less than 10. For example, if you add the di...

11 months ago

Solved


Number of digits in an integer
Specifies how many digits in a given integer. Example: in=100 ==> out=3

11 months ago

Solved


Concatenate strings
concatenate a variable number of input strings to produce one outputstring

11 months ago

Solved


Pattern Recognition 3 - Variable Unit and Array Length (including cell arrays)
You will be given various arrays, composed of numbers or strings, including cell arrays of strings. For this problem, the patter...

11 months ago

Solved


Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)
You will be given various arrays, composed of numbers or strings, including cell arrays of strings. For this problem, the known ...

11 months ago

Solved


Pattern Recognition 1 - Known Unit Length
You will be given various arrays, composed of numbers or strings. For this problem, the known pattern unit length is three. Writ...

11 months ago

Solved


Return fibonacci sequence do not use loop and condition version 2
Calculate the nth Fibonacci number,return sequence Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... ...

11 months ago

Solved


Twin Primes
Twin primes are pairs of primes that are immediately next to each other (difference of two). The lesser of twin primes are 3, 5,...

11 months ago

Solved


Mobius function
From wikipedia: For any positive integer n, define μ(n) as the sum of the primitive n-th roots of unity. It has values in {−1, ...

11 months ago

Solved


Return fibonacci sequence do not use loop and condition
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: ...

11 months ago

Solved


Not square-free number sequence
Not square-free numbers are all positive integers divisible by a square greater than one: 4, 8, 9, 12, 16, 18, 20, 24, 25, 27, ....

11 months ago

Solved


Self-similarity 3 - Every other pair of terms
Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

11 months ago

Solved


Weighted Gold/Silver Standard
Building off of the <http://www.mathworks.com/matlabcentral/cody/problems/8045-gold-standard Gold Standard> and <http://www.math...

11 months ago

Solved


Gold/Silver Standard
Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/8045-gold-standard Gold Standard> problem, suppose that yo...

11 months ago

Solved


Gold Standard
Gold has long been used as currency and a standard for currency, due to its inherent value and rarity. Historical data for gold ...

11 months ago

Solved


Self-similarity 2 - Every third term
Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

11 months ago

Solved


Self-similarity 1 - Every other term
Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

11 months ago

Solved


Sphenic number sequence
Sphenic numbers are positive integers that are products of three distinct prime numbers: 30, 42, 66, 70, 78, 102, 105, 110, 114,...

11 months ago

Solved


Split bread like the Pharaohs - Egyptian fractions and greedy algorithm
How would you split 5 loaves of bread among 8 people in all fairness? Get a hint from the Pharaohs. 5/8 = 4/8 + 1/8 , i.e. each ...

11 months ago

Solved


Math with Roman Numerals
Given a function R within (+,-,*,/) and two Roman numerals a & b, compute aRb in Roman numerals.

12 months ago

Solved


Convert Roman to Arabic Numerals
Based upon what I see on tv and at the movies, the use of Roman numerals indicates something is important or sophisticated (e.g....

12 months ago

Solved


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 ...

12 months ago

Solved


Increment a number, given its digits
Take as input an array of digits (e.g. x = [1 2 3]) and output an array of digits that is that number "incremented" properly, (i...

12 months ago

Solved


Decode a simplified barcode
Given a bar code from this <http://www.mathworks.com/matlabcentral/cody/problems/602-make-a-simplified-bar-code exercise>: Re...

12 months ago

Solved


Make a simplified barcode
Given an integer to encode, make a barcode using the following encoding scheme: * The bar code is made from the binary versio...

12 months 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...

12 months ago

Load more