There are to be 6 homes built on a new development site. They could
be semi-detached, detached or terraced houses. How many different
combinations of these can you find?
This challenge is to design different step arrangements, which must
go along a distance of 6 on the steps and must end up at 6 high.
Suppose there is a train with 24 carriages which are going to be put together to make up some new trains. Can you find all the ways that this can be done?
A green frog is sitting on a lily pad on one side of the pond. A
brown frog is sitting on a lily pad on the other side of the
The frogs want to swap places without getting wet.
There are three more lily pads for them to jump on.
Each frog takes a turn to jump one lily pad closer to the other
They can jump over each other if there's a space to land on.
They can't jump backwards.
How did they swap places?