MATHS FACTS

1. If you write out pi to two decimal places, backwards it spells "pie".

3.14 = PIE.

2. A French word for pie chart is "camembert".

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3. The spiral shapes of sunflowers follow a Fibonacci sequence.

That's where you add the two preceding numbers in this  equence to give you the next one. So it starts 1, 1, 2, 3, 5, 8, 13, 21, etc. The Fibonacci sequence shows up in nature a fair bit.