Take 7 playing cards.
Put them into any number of piles and arrange in descending order. For example:
Take one card from each pile to form a new pile.
Put the piles in descending order.
Keep repeating this process.
What do you notice?
Try all different combinations of 7 cards and try and represent your findings on paper. What is the longest sequence you can find?
Then try with 6 cards. What is different this time?
For more questions and solutions see our SAMI Maths Club app.