Golden ratio

There are 16 NRICH Mathematical resources connected to Golden ratio
Golden Fractions
problem

Golden fractions

Age
16 to 18
Challenge level
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Find the link between a sequence of continued fractions and the ratio of succesive Fibonacci numbers.
Gold Yet Again
problem

Gold yet again

Age
16 to 18
Challenge level
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Nick Lord says "This problem encapsulates for me the best features of the NRICH collection."
About Pythagorean Golden Means
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About pythagorean golden means

What is the relationship between the arithmetic, geometric and harmonic means of two numbers, the sides of a right angled triangle and the Golden Ratio?