Tag: Project Euler (5)

Problem Description

Link to Project Euler problem 4

A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is $9009=91\times99$.

Find the largest palindrome made from the product of two 3-digit numbers.

WARNING Solution ahead. Don’t read more if you want to enjoy the benefits of Project Euler and you haven’t already solved the problem.

Read more...

Problem Description

Link to Project Euler problem 3

The prime factors of 13195 are 5, 7, 13 and 29.

What is the largest prime factor of the number 600851475143?

WARNING Solution ahead. Don’t read more if you want to enjoy the benefits of Project Euler and you haven’t already solved the problem.

Read more...

Problem Description

Link to Project Euler problem 2

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1,2,3,5,8,13,21,34,55,89, …

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

WARNING Solution ahead. Don’t read more if you want to enjoy the benefits of Project Euler and you haven’t already solved the problem.

Read more...

Problem Description

Link to Project Euler problem 1

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

WARNING Solution ahead. Don’t read more if you want to enjoy the benefits of Project Euler and you haven’t already solved the problem.

Read more...

Solution to Project Euler problems with Literate Haskell.

Read more...