Posts Tagged ‘euler’

Problem 3 - Find the largest prime factor of a composite number

// June 15th, 2009 // 2 Comments » // Project Euler

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

What is the largest prime factor of the number 600851475143 ?

Problem 1 - Add all the natural numbers below one thousand that are multiples of 3 or 5

// May 26th, 2009 // 2 Comments » // Project Euler

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.