The Problem: Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. My solution (in Java): Straightforward problem. As always, I love feedback on how this solution could be improved!
The Problem: What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20 My Solution (in C++):
The Problem: A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99. Find the largest palindrome made from the product of two 3-digit numbers. My solution (in C++): Comment if you know a way to think about this problem that leads to […]
The Problem: What is the largest prime factor of the number 600851475143 ? My solution (in C++): This may be faster if I pre-generate primes less than the input using the Sieve of Eratosthenes method, then dividing by those primes.
The problem: By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms. My solution (in python):
The problem: Find the sum of all the multiples of 3 or 5 below 1000. My solution was just to use the principle of inclusion/exclusion. No code necessary.
Here I will upload either direct source code or links to my code stored on github. Currently, I am away from school and do not have access to the source code, but as soon as Winter Break is over, I will upload some of my work from last semester.
In addition to my work at school and on Programming Praxis exercises, I spend time working on problems from Project Euler. Currently, I have solved 13 problems. My solutions can be found here. I trust my visitors will not use my solutions to cheat on Project Euler problems. First, that’s unethical. Second, there are many […]
Here is my solution to the Programming Praxis problem for Dec. 18, 2012. It is written in Python, which proved to be quite straightforward. The task: Implement the Petals Around The Rose Game! (see link for more details) My solution:
Here’s my solution to the problem for Jan. 1, 2013. The solution is written in Python. The task: As we begin the new year, we note that 109-8*7+654*3-2/1 = 2013. There are three other combinations of the numbers 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, in order, combined with the five operators […]