# Blog

## Brainteaser: Skipping stairs

By Ariel Marcy, 21 March 2024

Flora likes to run up stairs as fast as she can! Sometimes she lands on every stair and sometimes she skips a stair, taking two in one stride. This gets her thinking: how many different ways can she run up a staircase?

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## Sequence This

By Ariel Marcy, 24 May 2023

Difficulty: Tricky Consider the following sequence of numbers. What number comes next? 1, 1, 2, 3, 5, 8, 13…

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## Draw a flower

By David Shaw, 25 November 2016

There are plenty of patterns inside a flower. Let’s follow one and see what drawing we get!

## Counting spirals

By David Shaw, 16 February 2013

There are some pretty amazing patterns lurking in nature. Do a bit of arithmetic and master the Fibonacci sequence, and then see where you can find it!

## Fibonacci fruit

By Mike, 16 January 2013

Having trouble finding a four-leafed clover? This activity explains why! If you’re getting ready for some gardening, keep this activity in the back of your mind as you marvel at Mother Nature’s mathematics.

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## Solar spiral optimises power

By David Shaw, 14 August 2012

Imagine a flat spiral, similar to a snail’s shell, coming closer and closer to a point. Now imagine more spiral lines, all centred on the same point. This shape looks like the clouds over a cyclone, or a whirling galaxy.

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## Why choose the Double Helix magazine for your students?

Perfect for ages 8 – 14

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