project-euler

Several project euler problems solved in C++

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.

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.

Euler problem 3 :

The prime factors of 13195 are 5, 7, 13 and 29 What is the largest prime factor of the number 600851475143

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