Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers. A … More

# Category: Project Euler: 20, 21, 22, 23, 24, 25

Project Euler Problems

# Project Euler – Problem # 22 – Solved with Go

What is the total of all the name scores in the file of first names? Using names.txt (right click and … More

# Project Euler – Problem # 22 – Solved with Java

What is the total of all the name scores in the file of first names? Using names.txt (right click and … More

# Project Euler – Problem # 21 – Solved with Go

Problem: Evaluate the sum of all amicable pairs under 10000. Let d(n) be defined as the sum of proper divisors … More

# Project Euler – Problem # 21 – Solved with Java

Problem: Evaluate the sum of all amicable pairs under 10000. Let d(n) be defined as the sum of proper divisors … More

# Project Euler – Problem # 20 – Solved with Go

Find the sum of digits in 100! n! means n * (n – 1) * … * 3 * 2 … More

# Project Euler – Problem # 20 – Solved with Java

Find the sum of digits in 100! n! means n * (n – 1) * … * 3 * 2 … More

# Project Euler – Problem # 25 – Solved with Python

It doesn’t take long for the Fibonacci sequence to get really large. This program asks for a stopping number, then … More

# Project Euler – Problem # 24 – Solved with Python

This problem was made easy with the permutations fucntion. Problem: A permutation is an ordered arrangement of objects. For example, … More

# Project Euler – Problem # 23 – Solved with Python

I first approached this problem with lists…. The test programs were running 15 + minutes , so I tried dictionaries, … More