Solved

Solve the arithmetic differential equation D(n) = n

2 years ago

Solved

Compute home primes in a given base

2 years ago

Solved

Compute the arithmetic derivative of integers

2 years ago

Solved

List Proth primes

2 years ago

Solved

List the nth prime quartet prefix
Prime numbers larger than 5 can end only in 1, 3, 7, or 9, but of course not all numbers ending in these four digits are prime. ...

2 years ago

Solved

Count the primes in Collatz sequences
Several Cody problems (21, 69, 42937, 44448, 44784, 52422) involve Collatz sequences. These start with a seed . If is odd, the ...

2 years ago

Solved

Find pairs of primes with the same digit sum

2 years ago

Solved

Find pairs of primes with the same digit sum and a specified separation

2 years ago

Solved

Area-01
Given the radius of the circle inscribed in a square, find the area that is not bounded by the circle but inside the square. ...

3 years ago

Solved

Create array of all Distances between two Sets of Points
This Challenge is a subsection of Martian Pranks based on Tim's efficient Distance calculation between sets of points. Given Po...

3 years ago

Solved

Generate a matrix as follows
write a Function that gives like the following for a random n: n=2 ans= [ 0 1 1 0] n=6 ans= [ 0 ...

3 years ago

Solved

Find the number of days in a given year
Given a year number (eg. 2000) as input, find how many days are there in the given year.

3 years ago

Solved

non-repitition of numbers in a vector

3 years ago

Solved

Label primes with the Erdos-Selfridge classification

3 years ago

Solved

List composite numbers that cannot be written as the sum of two primes

3 years ago

Solved

Identify prime words

3 years ago

Solved

Determine whether a number is unprimeable
The number 204 is unprimeable because no single digit can be changed to make it prime. In contrast, the number 207 is not unprim...

3 years ago

Solved

List the dihedral primes

3 years ago

Solved

Ugly numbers - 02
Ugly numbers are those whose prime factors are 2, 3 or 5. find the nth ugly number. n.b. unlike the previous problem,trivi...

3 years ago

Solved

Ugly numbers - 03
For this case, a number is defined ugly if it has prime factors consisting of only elements of x. Find the nth ugly number. ...

3 years ago

Solved

Play PRIMEGAME

3 years ago

Solved

Determine whether a number is a prime self number
Integers can be classified as generated numbers or self numbers. A generated number is one that can be expressed as the sum of a...

3 years ago

Solved

Ugly numbers - 01
Ugly numbers are those whose prime factors are 2, 3 or 5. find the nth ugly number.

3 years ago

Solved

List prime anagrams of a number

3 years ago

Solved

List Honaker primes
The number 131 is the 32nd prime number. It is a Honaker prime because the sum of its digits (1+3+1) equals the sum of the digit...

3 years ago

Solved

Palindromic Prime
Palindromic Prime is a prime number that is also a palindromic number. (Wiki, OEIS) If given a monotonic series (increment=1) ...

3 years ago

Solved

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"]; ...

3 years ago

Solved

Determina si el número es primo
Primero, antes que nada: ¿Qué es un número primo? Un número primo es cualquier número que solamente se puede dividir por 1 y ...

3 years ago

Solved

Sort Except Zeros
Sort the numbers in a vector. But the position of zeros should not be changed. Example: sort_except_zeros( [5 3 0 0 2 4] ) == [...

3 years ago

Solved

Tribonacci Sequence
Generate the tribonacci sequence upto n

3 years ago