Problem... Countdown

#MentalArithmetic, #MentalCalculation, #OrderOfOperations, 
#AlgorithmicThinking, #ComputationalThinking

• Download pdf format.
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• For a solution, see this from DataGenetics.
• To extend the activity, see this post.
• For a more in-depth algorithmic look.

On 'Incredible' Feats of Mental Arithmetic (in Countdown)