![Sticky Numbers](/sites/default/files/styles/medium/public/thumbnails/content-id-6571-icon.jpg?itok=gK-R2-2J)
problem
Sticky Numbers
Can you arrange the numbers 1 to 17 in a row so that each adjacent pair adds up to a square number?
![Pocket money](/sites/default/files/styles/medium/public/thumbnails/content-id-13687-icon.jpg?itok=PpAxNrhq)
![Power Countdown](/sites/default/files/styles/medium/public/thumbnails/content-id-6448-icon.png?itok=zr6QavbJ)
problem
Power Countdown
In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.
![Generating Triples](/sites/default/files/styles/medium/public/thumbnails/content-id-7282-icon.png?itok=rxebyRVc)
problem
Generating Triples
Sets of integers like 3, 4, 5 are called Pythagorean Triples, because they could be the lengths of the sides of a right-angled triangle. Can you find any more?
![Standard Index Form Matching](/sites/default/files/styles/medium/public/thumbnails/content-id-14530-icon.jpg?itok=VNvPXCl_)
problem
Standard Index Form Matching
Can you match these calculations in Standard Index Form with their answers?
![A question of scale](/sites/default/files/styles/medium/public/thumbnails/content-id-6349-icon.png?itok=h_zaxtec)
problem
A question of scale
Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
Image
![Powers and Roots STEM footer Powers and Roots STEM footer](/sites/default/files/styles/large/public/thumbnails/content-id-13465-STEMlogo.png?itok=htL9ZJiI)
You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.