We are on the "last 100 meters" with math preparation (the "challenge" will be next Friday) with my son. Interesting task, needs logical thinking more than math. Here is an exemple ;)
I will translate one for you...and waiting for the results ;)
  • a kid wrote down all of the the two-digit number in which the two numbers are the same. He chose two of these and added them up. How many total amounts could get? ;)
The second "task" for me for this week is to plan an air pollution reduction and energy recovery for industrial applications (not the principal planning is my task, "just" the review), because next month we need to go to France to install it... It will be hard, but not impossible! ;)
P.S. Waiting for your replies about the math solution :D