Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?
What's Happening?
Age 5 to 7 Challenge Level
We started with this pentagon.
Added a triangle:
Then another one:
What would come next, and why?
Can you invent something like these for your friends to solve?