![Highest and Lowest](/sites/default/files/styles/medium/public/thumbnails/content-99-04-penta5-icon.jpg?itok=Ikk6pjwc)
problem
Highest and Lowest
Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.
![Zios and Zepts](/sites/default/files/styles/medium/public/thumbnails/content-00-06-penta2-icon.png?itok=rhaJFIAE)
problem
Zios and Zepts
On the planet Vuv there are two sorts of creatures. The Zios have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zios and how many Zepts were there?
![Four goodness sake](/sites/default/files/styles/medium/public/thumbnails/content-01-11-penta3-icon.gif?itok=5ecUxTWW)
problem
Four goodness sake
Use 4 four times with simple operations so that you get the answer 12. Can you make 15, 16 and 17 too?
![This Pied Piper of Hamelin](/sites/default/files/styles/medium/public/thumbnails/content-id-8315-icon.gif?itok=BPa6O2ul)
problem
This Pied Piper of Hamelin
Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!