Here is a giant list of great sites to practice some puzzles for fun! You can do them when you want or make a goal to do one or a few a day. My current plan is to do one reddit daily planner when I can (ideally once a day, but hard to do with work schedule.. and *cough* DOTA 2!).
I suggest making a solution for your work and organizing it by puzzle...
Sunday, March 29, 2015
Monday, March 16, 2015
Project Euler - Smallest Multiple
Posted on Monday, March 16, 2015 by Crystal Tenn
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
(LCM of 1 to 20)
https://projecteuler.net/problem=5
public class Euler5
{
Listlist> allFactors = new Listlist>();
...
Tuesday, March 3, 2015
Project Euler - Largest palindrome product
Posted on Tuesday, March 03, 2015 by Crystal Tenn

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.
https://projecteuler.net/problem=4
...
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