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**Content Feed**

Solved

Initialize a Natural Number matrix.

Given length of matrix initialize a matrix consisting of natural numbers from 1 to n: n = 10; x = [ 1 2 3 4 5 6 7 8 9 10]; ...

8 months ago

Solved

Remove All elements less than 5

Given an input vector x, remove all elements of x less than 5 . Example: Input x = [ 1 2 5 7 3 ] Output y is [ 5 7 ...

8 months ago

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Pi Estimate 2

Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation2.pdf>

8 months ago

Solved

Pi Estimate 1

Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

8 months ago

Solved

Create the following sequence : 0 1 1 4 9 25 64 169 ...

The sequence 0, 1, 1, 4, 9, 25, 64, 169, ... represents the square of the sequence of Fibonacci numbers. Let n repres...

8 months ago

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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...

8 months ago

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Mysterious digits operation (easy)

What is this digit operation? 0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...

8 months ago

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How brilliant are you?

A Brilliant number is defined as a number with two prime factors, both of which have the same number of digits. Some examples: ...

8 months ago

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Highest powers in factorials

This is the inverse of the problem <https://www.mathworks.com/matlabcentral/cody/problems/44747 Exponents in Factorials>. Inste...

8 months ago

Solved

Pseudo Square Root (Inspired by Project Euler 266)

Shamelessly copied from the Project Euler page for Problem 266: ------------- The divisors of 12 are: 1,2,3,4,6 and 12. T...

8 months ago

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Don't be mean. Be nice!

For this problem, you will be given a range of single digits R, and a separate number K. You job is to calculate the mean of al...

8 months ago

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Circular Primes (based on Project Euler, problem 35)

The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime. The...

9 months ago

Solved

Create numeric palindromes and their square roots

Given a number n (1<=n<=9), return a left justified numeric matrix p with all the palindromes of the form 1 to n and back to 1. ...

9 months ago

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Strange Number Algorithms

Three integer numbers will be provided to you. Write a function to Step1: Multiply first number by 3. Step2: Add 6 with t...

9 months ago

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is the number happy?

test is a given integer number is Happy of not? answer 1 if yes or 0 is no

9 months ago

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Consecutive Powers

Return 2 numbers and 2 powers such that their difference is 1 A 4 element row vector is expected: x where x(1)^x(2) - x(...

9 months ago

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Is this number Munchhausen Narcissistic?

In this problem, simply return 1 if a supplied number is Munchhausen narcissistic or 0 if not. Example 153 is narcissistic...

9 months ago

Solved

Can I make a right triangle ?

Input(a) - is vector with any amount of values. Interpreted as legths of sides. Output(b): * Is true if there are any 3 va...

9 months ago

Solved

Create matrix with Gray code

Output "g" should be a matrix of class double, with <http://en.wikipedia.org/wiki/Gray_code Gray reflected binary code>. Inpu...

9 months ago

Solved

Vector Magnitude Calculator

'a' is a vector that starts at the origin and ends at (x, y). Find ||a||. Hint: It is as simple as "ABC".

9 months ago

Solved

Divisible by 14

Write a function to determine if a number is divisible by 14. If a number is <http://www.mathworks.com/matlabcentral/cody/proble...

9 months ago

Solved

Divisible by 15

Write a function to determine if a number is divisible by 15. If a number is <http://www.mathworks.com/matlabcentral/cody/proble...

9 months ago

Solved

Sphenic number sequence

<http://oeis.org/A007304 Sphenic numbers> are positive integers that are products of three distinct prime numbers: 30, 42, 66, 7...

9 months ago

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Long-digit Subtraction

Suppose you need to subtract a very large integer from another integer. <http://www.mathworks.com/matlabcentral/cody/problems/56...

9 months ago

Solved

Mersenne Primes vs. All Primes

A Mersenne prime (M) is a prime number of the form M = 2^p - 1, where p is another prime number. <https://www.mathworks.com/matl...

9 months ago

Solved

Pattern Sum

Write a function which receives two single digit positive integers, (k and m) as parameters and calculates the total sum as: k...

9 months ago

Solved

Simple Matrix

Make the following matrix without typing it in one by one. [1 2 3; 2 4 6; 4 8 12] x=[1 2 3].

11 months ago

Solved

Problem for beginners

M is a nxm matrix. Swap the fist and the second last column with eachother. X=[1 2 3;4 5 6;7 8 9] Y=[2 1 3;5 4 6;8 7 9]

11 months ago