Investigate the number of faces you can see when you arrange three cubes in different ways.
Find a great variety of ways of asking questions which make 8.
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
When Jack was one year old his mother bought a packet of $24$
candles for his birthday cake.
That year she put $1$ candle on Jack's cake. When he was two he
had $2$ candles and when he was three he had $3$ candles, and so
One day Jack's little sister Kate was born. She had
$1$ candle on her first birthday cake, $2$ candles on her second
birthday cake, and so on.
The candles were finished on one of Jack's birthdays
with just enough left.
How old was Jack when Kate was born? And how old was
each of them when the candles finally ran out?