Problems

  • Problem 1 - Add all the natural numbers below one thousand that are multiples of 3 or 5
  • Problem 2 - By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms
  • Problem 3 - Find the largest prime factor of a composite number
  • Problem 4 - Find the largest palindrome made from the product of two 3-digit numbers
  • Problem 5 - What is the smallest number divisible by each of the numbers 1 to 20?
  • Problem 6 - What is the difference between the sum of the squares and the square of the sums?
  • Problem 7 - Find the 10001st prime
  • Problem 8 - Discover the largest product of five consecutive digits in the 1000-digit number
  • Problem 9 - Find the only Pythagorean triplet, {abc}, for which a +b + c = 1000
  • Problem 10 - Calculate the sum of all the primes below two million
  • Problem 13 - Work out the first ten digits of the sum of the following one-hundred 50-digit numbers
  • Problem 14 - Find the longest sequence using a starting number under one million.
  • Problem 16 - What is the sum of the digits of the number 21000?
  • Problem 20 - Find the sum of digits in 100!

Previous page: VPN Ping Test
Next page: Problem 1