photo

William


Last seen: Today Active since 2012

Followers: 5   Following: 0

Message

Semi-retired physicist with interests in numerical modeling and mathematics.

Statistics

All
  • Treasure Hunt Participant
  • MATLAB Central Treasure Hunt Finisher
  • Thankful Level 2
  • Knowledgeable Level 3
  • Cody5 Hard Master
  • Computer Games I Master
  • R2016b Feature Challenge Master
  • 6 Month Streak
  • Logic
  • Knowledgeable Level 2
  • Quiz Master
  • Leader

View badges

Feeds

View by

Solved


Sum of Even Fibonacci Numbers
Description: The Fibonacci sequence is defined as follows:F(1)=1,F(2)=1,F(n)=F(n−1)+F(n−2) for n>2 Write a function that compu...

2 dagen ago

Solved


Count the primes resulting from changing one digit of a number
If you start with the number 24 and seek primes by changing a single digit, you can find two: 23 and 29. If you start with 130, ...

12 dagen ago

Solved


Indicate how the Prague astronomical clock strikes the hours
The astronomical clock in Prague has a bell that rings 1, 2, 3, or 4 times. The number of strokes follows the sequence 123432123...

13 dagen ago

Solved


Construct the number counts sequence
A sequence is constructed in the following way. The zeroth term is 1, and the next terms are determined by counting the number i...

14 dagen ago

Solved


Calculate y=2
Find the value of x so that y=2

17 dagen ago

Solved


Solve an easy binary puzzle
A binary puzzle presents a square grid (or matrix) of cells in which each cell must be 0 or 1. The finished puzzle must follow t...

20 dagen ago

Solved


List the first of three consecutive square-free numbers
The numbers 13, 14, and 15 are consecutive, of course, but they also share the property of being square-free. That is, each numb...

24 dagen ago

Solved


Convert integers from proper primary to base 10
The proper primary system of expressing numbers has three digits: m, x, and p, which correspond to -1, 0, and 1. The places in a...

ongeveer een maand ago

Solved


Play Hocus Focus
The card game Hocus Focus starts by placing twelve cards with wizards face up on a table. The characteristics of the wizards tha...

ongeveer 2 maanden ago

Solved


Express integers in negabinary
Negabinary numbers are written in base -2. For example, the negabinary number 11010 is , or 6 in base 10. In a similar way, -3 i...

ongeveer 2 maanden ago

Solved


List the partitions of an integer
Several Cody problems deal with partitions of an integer, or the ways an integer can be written as the sum of positive numbers—...

ongeveer 2 maanden ago

Solved


Simple addition
Add two numbers using a funciton

ongeveer 2 maanden ago

Solved


Complete hydraulic geometry relations
Hydraulic geometry relations express the velocity , width , and depth of a river as a function of the discharge (or flow) , whi...

ongeveer 2 maanden ago

Solved


EZ10
EZ

ongeveer 2 maanden ago

Solved


EZ9
EZ

ongeveer 2 maanden ago

Solved


EZ8
EZ

ongeveer 2 maanden ago

Solved


EZ7
EZ

ongeveer 2 maanden ago

Solved


Condition number of Kronecker product
Given NxN matrix A and MxM matrix B, where M,N<=1000, write a routine to compute the condition number of kron(A,B).

2 maanden ago

Solved


Find an inscribed square on a closed curve
Here's an unproven conjecture from geometry: Every simple closed curve in a plane contains all four vertices of some square. ...

3 maanden ago

Solved


Determine whether a number is a Ludic prime
Ludic numbers are formed by a sieve. Start with a list of the positive integers. Skip 1 and start with 2. Then delete every seco...

3 maanden ago

Solved


Identify points inside a Reuleaux triangle
Write a function to identify points that lie in or on a Realeaux triangle, which is a curve of constant width. The input to the ...

3 maanden ago

Solved


EZ6

3 maanden ago

Solved


EZ5
EZ5

3 maanden ago

Solved


EZ4

3 maanden ago

Solved


EZZ
EZZ

3 maanden ago

Solved


EZ
EZ

3 maanden ago

Solved


REPMAT Enhancement - Faster for Large Row Replication of Vector
The Challenge is to modify repmat.m to maintain all of its normal functionality and enhance its performance for large row replic...

3 maanden ago

Solved


Find the closest canyon prime
My wife and I celebrated our honeymoon and most recent anniversary in Yellowstone and Grand Teton National Parks. After returnin...

3 maanden ago

Solved


List composite numbers that do not contain their prime factors as substrings
The number 63 has the prime factorization 3, 3, and 7, and it contains one of them (3) as a substring. In contrast, the number 4...

3 maanden ago

Solved


Sum along each diagonal of a matrix
Write a routine that returns the sums along the diagonals of a given matrix, A, where the first diagonal is the bottom left corn...

3 maanden ago

Load more