Fibonacci sequence

There are 30 NRICH Mathematical resources connected to Fibonacci sequence
Fibonacci Surprises
problem

Fibonacci Surprises

Age
11 to 14
Challenge level
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Play around with the Fibonacci sequence and discover some surprising results!
Fibonacci Deduction
problem

Fibonacci Deduction

Age
11 to 14
Challenge level
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Leonard writes down a sequence of numbers. Can you find a formula to predict the seventh number in his sequence?
Farey Fibonacci
problem

Farey Fibonacci

Age
16 to 18
Challenge level
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Investigate Farey sequences of ratios of Fibonacci numbers.
Building Gnomons
problem

Building Gnomons

Age
14 to 16
Challenge level
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Build gnomons that are related to the Fibonacci sequence and try to explain why this is possible.
Simple Train Journeys
problem

Simple Train Journeys

Age
5 to 11
Challenge level
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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?
First Forward into Logo 11: Sequences
problem

First Forward into Logo 11: Sequences

Age
11 to 18
Challenge level
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This part introduces the use of Logo for number work. Learn how to use Logo to generate sequences of numbers.
Colour Building
problem

Colour Building

Age
11 to 14
Challenge level
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Using only the red and white rods, how many different ways are there to make up the other rods?
Plus or Minus
problem

Plus or Minus

Age
16 to 18
Challenge level
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Make and prove a conjecture about the value of the product of the Fibonacci numbers $F_{n+1}F_{n-1}$.
Pythagorean Fibs
problem

Pythagorean Fibs

Age
16 to 18
Challenge level
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What have Fibonacci numbers got to do with Pythagorean triples?
Fibonacci Fashion
problem

Fibonacci Fashion

Age
16 to 18
Challenge level
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What have Fibonacci numbers to do with solutions of the quadratic equation x^2 - x - 1 = 0 ?