Lower:

Ava and Dom make a vegemite sandwich. How can they share it fairly? Can you find three different ways to cut the sandwich?

Middle:

Coen is designing, making and selling number plates. Each can have a maximum of six characters, numbers or letters. Coen cannot use plus and minus signs, or any other mathematical symbols. He can make 10 by using ‘10’ or by ‘TEN’. In how many ways can he make 12? What number less than 20 can be represented in the most ways?

Upper:

Mr Pye bought some pigs, goats and sheep. Altogether he bought 100 animals and spent $600. Mr Pye paid $21 for each pig, $8 for each goat and $3 for each sheep. There was an even number of pigs. How many of each animal did Mr Pye buy?