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CS Unplugged activity

The Hidden Number Tree

About 20 minutesPairPencil

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.

Player A

Keep this page hidden from Player B.

Player B

Keep this page hidden from Player A.

Check your answers