Prime numbers

  • Prime sequences
    problem

    Prime Sequences

    Age
    16 to 18
    Challenge level
    filled star empty star empty star
    This group tasks allows you to search for arithmetic progressions in the prime numbers. How many of the challenges will you discover for yourself?
  • Factorial Fun
    problem

    Factorial Fun

    Age
    16 to 18
    Challenge level
    filled star filled star filled star

    How many divisors does factorial n (n!) have?