Here's a maths trick to try:
What do you notice?
Try the trick again with a new starting number from 1 to 9. What do you notice now?
Will this always happen if you start with a number from 1 to 9?
Jonas tried the trick with a few different numbers. He said:
Do you agree with Jonas? Can you help him explain what is happening?
Can you explain the trick in a different way?