### Baked Bean Cans

Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?

### Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

### Tea Cups

Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

# Ip Dip

##### Stage: 1 and 2 Challenge Level:

"Ip dip sky blue!  Who's 'it'?  It's you!"

Have you ever used this rhyme to decide who is 'it' in a game?

If you were playing a game with one friend and you wanted to be chosen to be 'it', would you start the rhyme pointing at yourself or your friend?

If there were three of you, how would you position yourself so that you were sure you'd be chosen?

How about with four of you?  Five ...? Six ...?  Seven ...? Eight ...? Nine ...?  Ten ...?  And so on?

How would you predict where you should stand to be chosen for any number of players?