Fibonacci sequence

  • Simple Train Journeys
    problem

    Simple train journeys

    Age
    5 to 11
    Challenge level
    filled star empty star empty star
    How many different journeys could you make if you were going to visit four stations in this network? How about if there were five stations? Can you predict the number of journeys for seven stations?
  • Fibonacci Deduction
    problem

    Fibonacci deduction

    Age
    11 to 14
    Challenge level
    filled star empty star empty star
    Leonard writes down a sequence of numbers. Can you find a formula to predict the seventh number in his sequence?
  • Golden Powers
    problem

    Golden powers

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    You add 1 to the golden ratio to get its square. How do you find higher powers?
  • Paving Paths
    problem

    Paving paths

    Age
    11 to 14
    Challenge level
    filled star filled star empty star
    How many different ways can I lay 10 paving slabs, each 2 foot by 1 foot, to make a path 2 foot wide and 10 foot long from my back door into my garden, without cutting any of the paving slabs?
  • LOGO Challenge - Circles as bugs
    problem

    LOGO challenge - circles as bugs

    Age
    11 to 16
    Challenge level
    filled star filled star empty star

    Here are some circle bugs to try to replicate with some elegant programming, plus some sequences generated elegantly in LOGO.

  • Golden Fibs
    problem

    Golden fibs

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    When is a Fibonacci sequence also a geometric sequence? When the ratio of successive terms is the golden ratio!
  • Fibonacci Fashion
    problem

    Fibonacci fashion

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    What have Fibonacci numbers to do with solutions of the quadratic equation x^2 - x - 1 = 0 ?
  • Pythagorean Fibs
    problem

    Pythagorean fibs

    Age
    16 to 18
    Challenge level
    filled star filled star empty star
    What have Fibonacci numbers got to do with Pythagorean triples?
  • Sheep Talk
    problem

    Sheep talk

    Age
    7 to 11
    Challenge level
    filled star filled star filled star
    In sheep talk the only letters used are B and A. A sequence of words is formed by following certain rules. What do you notice when you count the letters in each word?
  • Golden Fractions
    problem

    Golden fractions

    Age
    16 to 18
    Challenge level
    filled star filled star filled star
    Find the link between a sequence of continued fractions and the ratio of succesive Fibonacci numbers.