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?
Leah and Tom each have a number line. Can you work out where their counters will land? What are the secret jumps they make with their counters?
Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Are there some numbers that are good to aim for?