Category Archives: C

Projecteuler.net – Problem 10 – C solution

http://projecteuler.net/problem=10 The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million.

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 9 – C solution

http://projecteuler.net/problem=9 A Pythagorean triplet is a set of three natural numbers, a b c, for which, a2 + b2 = c2 For example, 32 + 42 = 9 + 16 = 25 = 52. There exists exactly one Pythagorean triplet for which a + b … Continue reading

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 8 – C solution

http://projecteuler.net/problem=8 Find the greatest product of five consecutive digits in the 1000-digit number. 731671765313 … … 0420752963450

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 7 – C solution

http://projecteuler.net/problem=7 By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13. What is the 10001st prime number?

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 6 – C solution

http://projecteuler.net/problem=6 The sum of the squares of the first ten natural numbers is, 12 + 22 + … + 102 = 385 The square of the sum of the first ten natural numbers is, (1 + 2 + … + … Continue reading

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 5 – C solution

http://projecteuler.net/problem=5 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?

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 4 – C solution

http://projecteuler.net/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 99. Find the largest palindrome made from the product of two 3-digit numbers.

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 3 – C solution

http://projecteuler.net/problem=3 The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ?

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 2 – C solution

http://projecteuler.net/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 … Continue reading

Posted in C, Project Euler | Leave a comment

Projecteuler.net – Problem 1 – C solution

http://projecteuler.net/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 … Continue reading

Posted in C, Project Euler | Leave a comment