Name Date Period ← CS Unplugged
CS Unplugged activity
The Hidden Number Tree
About 20 minutes Pair Pencil
Show:
Both players
Player A only
Player B only
Pick one player, print, then pick the other and print again.
You and a partner each hold a tree of hidden numbers. When it’s your turn
to hunt, you try to reach your target in as few reveals as possible. Follow
Round 1 and Round 2 below in order, then swap sheets and compare.
This worksheet draws its trees with JavaScript. Turn JavaScript on to see the boards.
Name Date Period Player A
Keep this page hidden from Player B.
Name Date Period Player B
Keep this page hidden from Player A.
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Adapted from CS Unplugged ,
by Tim Bell and the CS Unplugged team, University of Canterbury (csunplugged.org).
Licensed under CC BY-SA 4.0 .
original activity
