countdown maths What to do Similar to the numbers game on Countdown, can you make the bigger number using the smaller numbers on the pebbles? Maths (Year 2 and 3) Free Resource Simple resources found in the home. What to do: Choose 4 different numbered stones From the pile of different number cards, pick one Can you make the number using the digits on the stones using addition, subtraction, multiplication or division? If it’s too hard, select an additional number pebble to help