How to play Race to 20
- Choose the goal, the biggest number you may add, and who you play.
- Take turns adding a number to the running total.
- The player who reaches the goal exactly wins.
- Press Show the secret when you think you know the winning plan, or to find out.
Maths skills this game builds
- Strategic thinking
- Counting on and addition
- Working backwards from the goal
- Multiples and remainders
Tips for parents and carers
- Play a few times, then ask “What number do I want to reach next?”
- Change the goal to 30 or the biggest add to 4. Does the strategy change?
- Play on paper with a friend with a total written down.
Using Race to 20 with a group or class
- Class versus computer or two teams. After a few games, stop and ask for ideas about a winning plan.
- Challenge: how does the secret change if the goal changes?
- Link to multiples and remainders for older children.
Frequently asked questions
Is there a winning strategy?
Yes. Work backwards from the goal: you want to reach totals that leave your opponent no way to win.
Who has the advantage?
It depends on the goal and the biggest number you may add. Find out by playing.
What does the clever computer do?
It always uses the winning strategy if it has a chance.